diff --git a/DESCRIPTION b/DESCRIPTION
index 3e1fc47e..77db02e0 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -39,7 +39,7 @@ Imports:
     tibble,
     usethis,
     xml2
-RoxygenNote: 7.2.3
+RoxygenNote: 7.3.0
 Suggests:
     dplyr,
     ggplot2,
diff --git a/NAMESPACE b/NAMESPACE
index d9630348..d0907cfd 100644
--- a/NAMESPACE
+++ b/NAMESPACE
@@ -51,6 +51,7 @@ export(save_api_key)
 export(set_cache)
 import(cachem)
 import(glue)
+importFrom(MMWRweek,MMWRweek)
 importFrom(MMWRweek,MMWRweek2Date)
 importFrom(checkmate,assert)
 importFrom(checkmate,assert_character)
diff --git a/NEWS.md b/NEWS.md
index e41e8fc6..fe957aa9 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -20,6 +20,8 @@
 - `get_api_key` no longer reads from R options and only uses environment variables (#217).
 - Fix documentation related to CRAN submission.
 - Fix some errors from passing "" as a key.
+- `pvt_twitter` and `pub_wiki` now use `time_type` and `time_values` args instead of mutually exclusive `dates` and `epiweeks` (#236). This matches the interface of the `pub_covidcast` endpoint.
+- All endpoints now support the use of "\*" as a wildcard to fetch all dates or epiweeks (#234).
 
 # epidatr 1.0.0
 
diff --git a/R/endpoints.R b/R/endpoints.R
index ebc74fce..0146ca64 100644
--- a/R/endpoints.R
+++ b/R/endpoints.R
@@ -14,14 +14,20 @@
 #'
 #' @param auth string. Restricted access key (not the same as API key).
 #' @param locations character. Locations to fetch.
-#' @param epiweeks [`timeset`]. Epiweeks to fetch.
+#' @param epiweeks [`timeset`]. Epiweeks to fetch. Defaults to all ("*") dates.
 #' @param fetch_args [`fetch_args`]. Additional arguments to pass to `fetch()`.
 #'   See `fetch_args_list()` for details.
 #' @return [`tibble::tibble`]
 #'
 #' @keywords endpoint
 #' @export
-pvt_cdc <- function(auth, locations, epiweeks, fetch_args = fetch_args_list()) {
+pvt_cdc <- function(
+    auth,
+    locations,
+    epiweeks = "*",
+    fetch_args = fetch_args_list()) {
+  epiweeks <- get_wildcard_equivalent_dates(epiweeks, "week")
+
   assert_character_param("auth", auth, len = 1)
   assert_character_param("locations", locations)
   assert_timeset_param("epiweeks", epiweeks)
@@ -155,32 +161,62 @@ pub_covid_hosp_facility_lookup <- function(
 #'   hospital_pks = "100075",
 #'   collection_weeks = epirange(20200101, 20200501)
 #' )
+#'
+#' pub_covid_hosp_facility(
+#'   hospital_pks = "100075",
+#'   collection_weeks = epirange(202001, 202005)
+#' )
 #' }
 #' @param hospital_pks character. Facility identifiers.
-#' @param collection_weeks [`timeset`]. Epiweeks to fetch.
+#' @param collection_weeks [`timeset`]. Dates (corresponding to epiweeks) to
+#'  fetch. Defaults to all ("*") dates.
 #' @param ... not used for values, forces later arguments to bind by name
 #' @param publication_dates [`timeset`]. Publication dates to fetch.
 #' @param fetch_args [`fetch_args`]. Additional arguments to pass to `fetch()`.
 #' @return [`tibble::tibble`]
 #'
+#' @importFrom checkmate test_class test_integerish test_character
+#'
 #' @seealso [`pub_covid_hosp_facility()`], [`epirange()`]
 #' @keywords endpoint
 #' @export
 #
 pub_covid_hosp_facility <- function(
     hospital_pks,
-    collection_weeks,
+    collection_weeks = "*",
     ...,
     publication_dates = NULL,
     fetch_args = fetch_args_list()) {
   rlang::check_dots_empty()
 
+  collection_weeks <- get_wildcard_equivalent_dates(collection_weeks, "day")
+
   assert_character_param("hospital_pks", hospital_pks)
   assert_timeset_param("collection_weeks", collection_weeks)
   assert_timeset_param("publication_dates", publication_dates, required = FALSE)
   collection_weeks <- parse_timeset_input(collection_weeks)
   publication_dates <- parse_timeset_input(publication_dates)
 
+  # Confusingly, the endpoint expects `collection_weeks` to be in day format,
+  # but correspond to epiweeks. Allow `collection_weeks` to be provided in
+  # either day or week format.
+  coercion_msg <- c(
+    "`collection_weeks` is in week format but `pub_covid_hosp_facility`
+       expects day format; dates will be converted to day format but may not
+       correspond exactly to desired time range"
+  )
+  if (test_class(collection_weeks, "EpiRange") && nchar(collection_weeks$from) == 6) {
+    cli::cli_warn(coercion_msg, class = "epidatr__epirange_week_coercion")
+    collection_weeks <- reformat_epirange(collection_weeks, to_type = "day")
+    # Single week date.
+  } else if (
+    (test_integerish(collection_weeks) || test_character(collection_weeks)) &&
+      nchar(collection_weeks) == 6
+  ) {
+    cli::cli_warn(coercion_msg, class = "epidatr__single_week_coercion")
+    collection_weeks <- parse_api_week(collection_weeks)
+  }
+
   create_epidata_call(
     "covid_hosp_facility/",
     list(
@@ -516,7 +552,7 @@ pub_covid_hosp_facility <- function(
 #' }
 #'
 #' @param states character. Two letter state abbreviations.
-#' @param dates [`timeset`]. Dates to fetch.
+#' @param dates [`timeset`]. Dates to fetch. Defaults to all ("*") dates.
 #' @param ... not used for values, forces later arguments to bind by name
 #' @param as_of Date. Optionally, the as of date for the issues to fetch. If not
 #'   specified, the most recent data is returned. Mutually exclusive with
@@ -532,7 +568,7 @@ pub_covid_hosp_facility <- function(
 #
 pub_covid_hosp_state_timeseries <- function(
     states,
-    dates,
+    dates = "*",
     ...,
     as_of = NULL,
     issues = NULL,
@@ -550,6 +586,8 @@ pub_covid_hosp_state_timeseries <- function(
     stop("`issues`and `as_of` are mutually exclusive")
   }
 
+  dates <- get_wildcard_equivalent_dates(dates, "day")
+
   assert_character_param("states", states)
   assert_timeset_param("dates", dates)
   assert_date_param("as_of", as_of, len = 1, required = FALSE)
@@ -925,7 +963,7 @@ pub_covidcast_meta <- function(fetch_args = fetch_args_list()) {
 #' @param geo_values character. The geographies to return. "*" fetches
 #'   all. (See:
 #'   <https://cmu-delphi.github.io/delphi-epidata/api/covidcast_geography.html>.)
-#' @param time_values [`timeset`]. Dates to fetch.
+#' @param time_values [`timeset`]. Dates to fetch. Defaults to all ("*") dates.
 #' @param ... not used for values, forces later arguments to bind by name
 #' @param as_of Date. Optionally, the as of date for the issues to fetch. If not
 #'   specified, the most recent data is returned. Mutually exclusive with
@@ -947,8 +985,8 @@ pub_covidcast <- function(
     signals,
     geo_type,
     time_type,
-    geo_values,
-    time_values,
+    geo_values = "*",
+    time_values = "*",
     ...,
     as_of = NULL,
     issues = NULL,
@@ -1036,12 +1074,16 @@ pub_covidcast <- function(
 #' pub_delphi(system = "ec", epiweek = 201501)
 #' }
 #' @param system character. System name to fetch.
-#' @param epiweek [`timeset`]. Epiweeks to fetch.
+#' @param epiweek [`timeset`]. Epiweek to fetch. Does not support multiple dates.
+#'  Make separate calls to fetch data for multiple epiweeks.
 #' @param fetch_args [`fetch_args`]. Additional arguments to pass to `fetch()`.
 #' @return [`list`]
 #' @keywords endpoint
 #' @export
-pub_delphi <- function(system, epiweek, fetch_args = fetch_args_list()) {
+pub_delphi <- function(
+    system,
+    epiweek,
+    fetch_args = fetch_args_list()) {
   assert_character_param("system", system)
   assert_timeset_param("epiweek", epiweek, len = 1)
   epiweek <- parse_timeset_input(epiweek)
@@ -1070,12 +1112,17 @@ pub_delphi <- function(system, epiweek, fetch_args = fetch_args_list()) {
 #' )
 #' }
 #' @param locations character. Locations to fetch.
-#' @param epiweeks [`timeset`]. Epiweeks to fetch.
+#' @param epiweeks [`timeset`]. Epiweeks to fetch. Defaults to all ("*") dates.
 #' @param fetch_args [`fetch_args`]. Additional arguments to pass to `fetch()`.
 #' @return [`tibble::tibble`]
 #' @keywords endpoint
 #' @export
-pub_dengue_nowcast <- function(locations, epiweeks, fetch_args = fetch_args_list()) {
+pub_dengue_nowcast <- function(
+    locations,
+    epiweeks = "*",
+    fetch_args = fetch_args_list()) {
+  epiweeks <- get_wildcard_equivalent_dates(epiweeks, "week")
+
   assert_character_param("locations", locations)
   assert_timeset_param("epiweeks", epiweeks)
   epiweeks <- parse_timeset_input(epiweeks)
@@ -1108,12 +1155,19 @@ pub_dengue_nowcast <- function(locations, epiweeks, fetch_args = fetch_args_list
 #' @param auth string. Restricted access key (not the same as API key).
 #' @param names character. Names to fetch.
 #' @param locations character. Locations to fetch.
-#' @param epiweeks [`timeset`]. Epiweeks to fetch.
+#' @param epiweeks [`timeset`]. Epiweeks to fetch. Defaults to all ("*") dates.
 #' @param fetch_args [`fetch_args`]. Additional arguments to pass to `fetch()`.
 #' @return [`tibble::tibble`]
 #' @keywords endpoint
 #' @export
-pvt_dengue_sensors <- function(auth, names, locations, epiweeks, fetch_args = fetch_args_list()) {
+pvt_dengue_sensors <- function(
+    auth,
+    names,
+    locations,
+    epiweeks = "*",
+    fetch_args = fetch_args_list()) {
+  epiweeks <- get_wildcard_equivalent_dates(epiweeks, "week")
+
   assert_character_param("auth", auth, len = 1)
   assert_character_param("names", names)
   assert_character_param("locations", locations)
@@ -1153,7 +1207,7 @@ pvt_dengue_sensors <- function(auth, names, locations, epiweeks, fetch_args = fe
 #' pub_ecdc_ili(regions = "austria", epiweeks = epirange(201901, 202001))
 #' }
 #' @param regions character. Regions to fetch.
-#' @param epiweeks [`timeset`]. Epiweeks to fetch.
+#' @param epiweeks [`timeset`]. Epiweeks to fetch. Defaults to all ("*") dates.
 #' @param ... not used for values, forces later arguments to bind by name
 #' @param issues [`timeset`]. Optionally, the issues to fetch. If not set, the
 #'   most recent issue is returned. Mutually exclusive with `lag`.
@@ -1163,9 +1217,17 @@ pvt_dengue_sensors <- function(auth, names, locations, epiweeks, fetch_args = fe
 #' @return [`tibble::tibble`]
 #' @keywords endpoint
 #' @export
-pub_ecdc_ili <- function(regions, epiweeks, ..., issues = NULL, lag = NULL, fetch_args = fetch_args_list()) {
+pub_ecdc_ili <- function(
+    regions,
+    epiweeks = "*",
+    ...,
+    issues = NULL,
+    lag = NULL,
+    fetch_args = fetch_args_list()) {
   rlang::check_dots_empty()
 
+  epiweeks <- get_wildcard_equivalent_dates(epiweeks, "week")
+
   assert_character_param("regions", regions)
   assert_timeset_param("epiweeks", epiweeks)
   assert_timeset_param("issues", issues, required = FALSE)
@@ -1212,7 +1274,7 @@ pub_ecdc_ili <- function(regions, epiweeks, ..., issues = NULL, lag = NULL, fetc
 #' pub_flusurv(locations = "CA", epiweeks = epirange(201701, 201801))
 #' }
 #' @param locations character. Character vector indicating location.
-#' @param epiweeks [`timeset`]. Epiweeks to fetch.
+#' @param epiweeks [`timeset`]. Epiweeks to fetch. Defaults to all ("*") dates.
 #' @param ... not used for values, forces later arguments to bind by name
 #' @param issues [`timeset`]. Optionally, the issues to fetch. If not set, the
 #'   most recent issue is returned. Mutually exclusive with `lag`.
@@ -1222,9 +1284,17 @@ pub_ecdc_ili <- function(regions, epiweeks, ..., issues = NULL, lag = NULL, fetc
 #' @return [`tibble::tibble`]
 #' @keywords endpoint
 #' @export
-pub_flusurv <- function(locations, epiweeks, ..., issues = NULL, lag = NULL, fetch_args = fetch_args_list()) {
+pub_flusurv <- function(
+    locations,
+    epiweeks = "*",
+    ...,
+    issues = NULL,
+    lag = NULL,
+    fetch_args = fetch_args_list()) {
   rlang::check_dots_empty()
 
+  epiweeks <- get_wildcard_equivalent_dates(epiweeks, "week")
+
   assert_character_param("locations", locations)
   assert_timeset_param("epiweeks", epiweeks)
   assert_timeset_param("issues", issues, required = FALSE)
@@ -1270,7 +1340,7 @@ pub_flusurv <- function(locations, epiweeks, ..., issues = NULL, lag = NULL, fet
 #' @param regions character. Regions to fetch.
 #' @param epiweeks [`timeset`]. Epiweeks to fetch in the form
 #'   epirange(startweek,endweek), where startweek and endweek are of the form
-#'   YYYYWW (string or numeric).
+#'   YYYYWW (string or numeric). Defaults to all ("*") dates.
 #' @param ... not used for values, forces later arguments to bind by name
 #' @param issues [`timeset`]. Optionally, the issues to fetch. If not set, the
 #'   most recent issue is returned. Mutually exclusive with `lag`.
@@ -1280,9 +1350,17 @@ pub_flusurv <- function(locations, epiweeks, ..., issues = NULL, lag = NULL, fet
 #' @return [`tibble::tibble`]
 #' @keywords endpoint
 #' @export
-pub_fluview_clinical <- function(regions, epiweeks, ..., issues = NULL, lag = NULL, fetch_args = fetch_args_list()) {
+pub_fluview_clinical <- function(
+    regions,
+    epiweeks = "*",
+    ...,
+    issues = NULL,
+    lag = NULL,
+    fetch_args = fetch_args_list()) {
   rlang::check_dots_empty()
 
+  epiweeks <- get_wildcard_equivalent_dates(epiweeks, "week")
+
   assert_character_param("regions", regions)
   assert_timeset_param("epiweeks", epiweeks)
   assert_timeset_param("issues", issues, required = FALSE)
@@ -1367,7 +1445,7 @@ pub_fluview_meta <- function(fetch_args = fetch_args_list()) {
 #'   on. Full list link below.
 #' @param epiweeks [`timeset`]. Epiweeks to fetch in the form
 #'   `epirange(startweek, endweek)`, where startweek and endweek are of the form
-#'   YYYYWW (string or numeric).
+#'   YYYYWW (string or numeric). Defaults to all ("*") dates.
 #' @param ... not used for values, forces later arguments to bind by name
 #' @param issues [`timeset`]. Optionally, the issues to fetch. If not set, the
 #'   most recent issue is returned. Mutually exclusive with `lag`.
@@ -1381,7 +1459,7 @@ pub_fluview_meta <- function(fetch_args = fetch_args_list()) {
 #' @export
 pub_fluview <- function(
     regions,
-    epiweeks,
+    epiweeks = "*",
     ...,
     issues = NULL,
     lag = NULL,
@@ -1389,6 +1467,8 @@ pub_fluview <- function(
     fetch_args = fetch_args_list()) {
   rlang::check_dots_empty()
 
+  epiweeks <- get_wildcard_equivalent_dates(epiweeks, "week")
+
   assert_character_param("regions", regions)
   assert_timeset_param("epiweeks", epiweeks)
   assert_timeset_param("issues", issues, required = FALSE)
@@ -1451,13 +1531,18 @@ pub_fluview <- function(
 #' pub_gft(locations = "hhs1", epiweeks = epirange(201201, 202001))
 #' }
 #' @param locations character. Locations to fetch.
-#' @param epiweeks [`timeset`] Epiweeks to fetch.
+#' @param epiweeks [`timeset`] Epiweeks to fetch. Defaults to all ("*") dates.
 #' @param fetch_args [`fetch_args`]. Additional arguments to pass to `fetch()`.
 #'
 #' @return [`tibble::tibble`]
 #' @keywords endpoint
 #' @export
-pub_gft <- function(locations, epiweeks, fetch_args = fetch_args_list()) {
+pub_gft <- function(
+    locations,
+    epiweeks = "*",
+    fetch_args = fetch_args_list()) {
+  epiweeks <- get_wildcard_equivalent_dates(epiweeks, "week")
+
   assert_character_param("locations", locations)
   assert_timeset_param("epiweeks", epiweeks)
   epiweeks <- parse_timeset_input(epiweeks)
@@ -1491,13 +1576,20 @@ pub_gft <- function(locations, epiweeks, fetch_args = fetch_args_list()) {
 #' }
 #' @param auth string. Restricted access key (not the same as API key).
 #' @param locations character. Locations to fetch.
-#' @param epiweeks [`timeset`]. Epiweeks to fetch.
+#' @param epiweeks [`timeset`]. Epiweeks to fetch. Defaults to all ("*") dates.
 #' @param query string. The query to be fetched.
 #' @param fetch_args [`fetch_args`]. Additional arguments to pass to `fetch()`.
 #' @return [`tibble::tibble`]
 #' @keywords endpoint
 #' @export
-pvt_ght <- function(auth, locations, epiweeks, query, fetch_args = fetch_args_list()) {
+pvt_ght <- function(
+    auth,
+    locations,
+    epiweeks = "*",
+    query,
+    fetch_args = fetch_args_list()) {
+  epiweeks <- get_wildcard_equivalent_dates(epiweeks, "week")
+
   assert_character_param("auth", auth, len = 1)
   assert_character_param("locations", locations)
   assert_timeset_param("epiweeks", epiweeks)
@@ -1529,7 +1621,7 @@ pvt_ght <- function(auth, locations, epiweeks, query, fetch_args = fetch_args_li
 #' pub_kcdc_ili(regions = "ROK", epiweeks = 200436)
 #' }
 #' @param regions character. Regions to fetch.
-#' @param epiweeks [`timeset`]. Epiweeks to fetch.
+#' @param epiweeks [`timeset`]. Epiweeks to fetch. Defaults to all ("*") dates.
 #' @param ... not used for values, forces later arguments to bind by name
 #' @param issues [`timeset`]. Optionally, the issues to fetch. If not set, the
 #'   most recent issue is returned. Mutually exclusive with `lag`.
@@ -1539,9 +1631,17 @@ pvt_ght <- function(auth, locations, epiweeks, query, fetch_args = fetch_args_li
 #' @return [`tibble::tibble`]
 #' @keywords endpoint
 #' @export
-pub_kcdc_ili <- function(regions, epiweeks, ..., issues = NULL, lag = NULL, fetch_args = fetch_args_list()) {
+pub_kcdc_ili <- function(
+    regions,
+    epiweeks = "*",
+    ...,
+    issues = NULL,
+    lag = NULL,
+    fetch_args = fetch_args_list()) {
   rlang::check_dots_empty()
 
+  epiweeks <- get_wildcard_equivalent_dates(epiweeks, "week")
+
   assert_character_param("regions", regions)
   assert_timeset_param("epiweeks", epiweeks)
   assert_timeset_param("issues", issues, required = FALSE)
@@ -1626,13 +1726,18 @@ pub_meta <- function(fetch_args = fetch_args_list()) {
 #' pub_nidss_dengue(locations = "taipei", epiweeks = epirange(201201, 201301))
 #' }
 #' @param locations character. Locations to fetch.
-#' @param epiweeks [`timeset`]. Epiweeks to fetch.
+#' @param epiweeks [`timeset`]. Epiweeks to fetch. Defaults to all ("*") dates.
 #' @param fetch_args [`fetch_args`]. Additional arguments to pass to `fetch()`.
 #'
 #' @return [`tibble::tibble`]
 #' @keywords endpoint
 #' @export
-pub_nidss_dengue <- function(locations, epiweeks, fetch_args = fetch_args_list()) {
+pub_nidss_dengue <- function(
+    locations,
+    epiweeks = "*",
+    fetch_args = fetch_args_list()) {
+  epiweeks <- get_wildcard_equivalent_dates(epiweeks, "week")
+
   assert_character_param("locations", locations)
   assert_timeset_param("epiweeks", epiweeks)
   epiweeks <- parse_timeset_input(epiweeks)
@@ -1661,7 +1766,7 @@ pub_nidss_dengue <- function(locations, epiweeks, fetch_args = fetch_args_list()
 #' pub_nidss_flu(regions = "taipei", epiweeks = epirange(201501, 201601))
 #' }
 #' @param regions character. Regions to fetch.
-#' @param epiweeks [`timeset`]. Epiweeks to fetch.
+#' @param epiweeks [`timeset`]. Epiweeks to fetch. Defaults to all ("*") dates.
 #' @param ... not used for values, forces later arguments to bind by name
 #' @param issues [`timeset`]. Optionally, the issues to fetch. If not set, the
 #'   most recent issue is returned. Mutually exclusive with `lag`.
@@ -1671,9 +1776,17 @@ pub_nidss_dengue <- function(locations, epiweeks, fetch_args = fetch_args_list()
 #' @return [`tibble::tibble`]
 #' @keywords endpoint
 #' @export
-pub_nidss_flu <- function(regions, epiweeks, ..., issues = NULL, lag = NULL, fetch_args = fetch_args_list()) {
+pub_nidss_flu <- function(
+    regions,
+    epiweeks = "*",
+    ...,
+    issues = NULL,
+    lag = NULL,
+    fetch_args = fetch_args_list()) {
   rlang::check_dots_empty()
 
+  epiweeks <- get_wildcard_equivalent_dates(epiweeks, "week")
+
   assert_character_param("regions", regions)
   assert_timeset_param("epiweeks", epiweeks)
   assert_timeset_param("issues", issues, required = FALSE)
@@ -1725,12 +1838,18 @@ pub_nidss_flu <- function(regions, epiweeks, ..., issues = NULL, lag = NULL, fet
 #' }
 #' @param auth string. Your authentication key.
 #' @param locations character. Locations to fetch.
-#' @param epiweeks [`timeset`]. Epiweeks to fetch.
+#' @param epiweeks [`timeset`]. Epiweeks to fetch. Defaults to all ("*") dates.
 #' @param fetch_args [`fetch_args`]. Additional arguments to pass to `fetch()`.
 #' @return [`tibble::tibble`]
 #' @keywords endpoint
 #' @export
-pvt_norostat <- function(auth, locations, epiweeks, fetch_args = fetch_args_list()) {
+pvt_norostat <- function(
+    auth,
+    locations,
+    epiweeks = "*",
+    fetch_args = fetch_args_list()) {
+  epiweeks <- get_wildcard_equivalent_dates(epiweeks, "week")
+
   assert_character_param("auth", auth, len = 1)
   assert_character_param("locations", locations, len = 1)
   assert_timeset_param("epiweeks", epiweeks)
@@ -1765,12 +1884,17 @@ pvt_norostat <- function(auth, locations, epiweeks, fetch_args = fetch_args_list
 #' pub_nowcast(locations = "ca", epiweeks = epirange(201201, 201301))
 #' }
 #' @param locations character. Locations to fetch.
-#' @param epiweeks [`timeset`]. Epiweeks to fetch.
+#' @param epiweeks [`timeset`]. Epiweeks to fetch. Defaults to all ("*") dates.
 #' @param fetch_args [`fetch_args`]. Additional arguments to pass to `fetch()`.
 #' @return [`tibble::tibble`]
 #' @keywords endpoint
 #' @export
-pub_nowcast <- function(locations, epiweeks, fetch_args = fetch_args_list()) {
+pub_nowcast <- function(
+    locations,
+    epiweeks = "*",
+    fetch_args = fetch_args_list()) {
+  epiweeks <- get_wildcard_equivalent_dates(epiweeks, "week")
+
   assert_character_param("locations", locations)
   assert_timeset_param("epiweeks", epiweeks)
   epiweeks <- parse_timeset_input(epiweeks)
@@ -1796,7 +1920,7 @@ pub_nowcast <- function(locations, epiweeks, fetch_args = fetch_args_list()) {
 #' pub_paho_dengue(regions = "ca", epiweeks = epirange(201401, 201501))
 #' }
 #' @param regions character. Regions to fetch.
-#' @param epiweeks [`timeset`]. Epiweeks to fetch.
+#' @param epiweeks [`timeset`]. Epiweeks to fetch. Defaults to all ("*") dates.
 #' @param ... not used for values, forces later arguments to bind by name
 #' @param issues [`timeset`]. Optionally, the issues to fetch. If not set, the
 #'   most recent issue is returned. Mutually exclusive with `lag`.
@@ -1806,9 +1930,17 @@ pub_nowcast <- function(locations, epiweeks, fetch_args = fetch_args_list()) {
 #' @return [`tibble::tibble`]
 #' @keywords endpoint
 #' @export
-pub_paho_dengue <- function(regions, epiweeks, ..., issues = NULL, lag = NULL, fetch_args = fetch_args_list()) {
+pub_paho_dengue <- function(
+    regions,
+    epiweeks = "*",
+    ...,
+    issues = NULL,
+    lag = NULL,
+    fetch_args = fetch_args_list()) {
   rlang::check_dots_empty()
 
+  epiweeks <- get_wildcard_equivalent_dates(epiweeks, "week")
+
   assert_character_param("regions", regions)
   assert_timeset_param("epiweeks", epiweeks)
   assert_timeset_param("issues", issues, required = FALSE)
@@ -1856,12 +1988,18 @@ pub_paho_dengue <- function(regions, epiweeks, ..., issues = NULL, lag = NULL, f
 #' }
 #' @param auth string. Restricted access key (not the same as API key).
 #' @param locations character. Locations to fetch.
-#' @param epiweeks [`timeset`]. Epiweeks to fetch.
+#' @param epiweeks [`timeset`]. Epiweeks to fetch. Defaults to all ("*") dates.
 #' @param fetch_args [`fetch_args`]. Additional arguments to pass to `fetch()`.
 #' @return [`tibble::tibble`]
 #' @keywords endpoint
 #' @export
-pvt_quidel <- function(auth, locations, epiweeks, fetch_args = fetch_args_list()) {
+pvt_quidel <- function(
+    auth,
+    locations,
+    epiweeks = "*",
+    fetch_args = fetch_args_list()) {
+  epiweeks <- get_wildcard_equivalent_dates(epiweeks, "week")
+
   assert_character_param("auth", auth, len = 1)
   assert_character_param("locations", locations)
   assert_timeset_param("epiweeks", epiweeks)
@@ -1909,12 +2047,19 @@ pvt_quidel <- function(auth, locations, epiweeks, fetch_args = fetch_args_list()
 #' @param auth string. Restricted access key (not the same as API key).
 #' @param names character. Sensor names to fetch.
 #' @param locations character. Locations to fetch.
-#' @param epiweeks [`timeset`]. Epiweeks to fetch.
+#' @param epiweeks [`timeset`]. Epiweeks to fetch. Defaults to all ("*") dates.
 #' @param fetch_args [`fetch_args`]. Additional arguments to pass to `fetch()`.
 #' @return [`tibble::tibble`]
 #' @keywords endpoint
 #' @export
-pvt_sensors <- function(auth, names, locations, epiweeks, fetch_args = fetch_args_list()) {
+pvt_sensors <- function(
+    auth,
+    names,
+    locations,
+    epiweeks = "*",
+    fetch_args = fetch_args_list()) {
+  epiweeks <- get_wildcard_equivalent_dates(epiweeks, "week")
+
   assert_character_param("auth", auth, len = 1)
   assert_character_param("names", names)
   assert_character_param("locations", locations)
@@ -1951,32 +2096,50 @@ pvt_sensors <- function(auth, names, locations, epiweeks, fetch_args = fetch_arg
 #' pvt_twitter(
 #'   auth = Sys.getenv("SECRET_API_AUTH_TWITTER"),
 #'   locations = "CA",
-#'   epiweeks = epirange(201501, 202001)
+#'   time_type = "week",
+#'   time_values = epirange(201501, 202001)
 #' )
 #' }
 #' @param auth string. Restricted access key (not the same as API key).
 #' @param locations character. Locations to fetch.
 #' @param ... not used for values, forces later arguments to bind by name
-#' @param dates [`timeset`]. Dates to fetch. Mutually exclusive with `epiweeks`.
-#' @param epiweeks [`timeset`]. Epiweeks to fetch. Mutually exclusive with
-#' `dates`.
+#' @param time_type string. The temporal resolution of the data (either "day" or
+#'  "week", depending on signal).
+#' @param time_values [`timeset`]. Dates or epiweeks to fetch. Defaults to all
+#'  ("*") dates.
 #' @param fetch_args [`fetch_args`]. Additional arguments to pass to `fetch()`.
 #' @return [`tibble::tibble`]
 #' @keywords endpoint
 #' @export
-pvt_twitter <- function(auth, locations, ..., dates = NULL, epiweeks = NULL, fetch_args = fetch_args_list()) {
+pvt_twitter <- function(
+    auth,
+    locations,
+    ...,
+    time_type = c("day", "week"),
+    time_values = "*",
+    fetch_args = fetch_args_list()) {
   rlang::check_dots_empty()
 
+  time_type <- match.arg(time_type)
+  if (time_type == "day") {
+    dates <- time_values
+    epiweeks <- NULL
+    dates <- get_wildcard_equivalent_dates(dates, "day")
+  } else {
+    dates <- NULL
+    epiweeks <- time_values
+    epiweeks <- get_wildcard_equivalent_dates(epiweeks, "week")
+  }
+
   assert_character_param("auth", auth, len = 1)
   assert_character_param("locations", locations)
+  assert_character_param("time_type", time_type, len = 1)
+  assert_timeset_param("time_values", time_values)
   assert_timeset_param("dates", dates, required = FALSE)
   assert_timeset_param("epiweeks", epiweeks, required = FALSE)
   dates <- parse_timeset_input(dates)
   epiweeks <- parse_timeset_input(epiweeks)
 
-  if (!xor(is.null(dates), is.null(epiweeks))) {
-    stop("exactly one of `dates` and `epiweeks` is required")
-  }
   time_field <- if (!is.null(dates)) {
     create_epidata_field_info("date", "date")
   } else {
@@ -2014,13 +2177,18 @@ pvt_twitter <- function(auth, locations, ..., dates = NULL, epiweeks = NULL, fet
 #'
 #' @examples
 #' \dontrun{
-#' pub_wiki(articles = "avian_influenza", epiweeks = epirange(201501, 201601))
+#' pub_wiki(
+#'   articles = "avian_influenza",
+#'   time_type = "week",
+#'   time_values = epirange(201501, 201601)
+#' )
 #' }
 #' @param articles character. Articles to fetch.
 #' @param ... not used for values, forces later arguments to bind by name
-#' @param dates [`timeset`]. Dates to fetch. Mutually exclusive with `epiweeks`.
-#' @param epiweeks [`timeset`]. Epiweeks to fetch. Mutually exclusive with
-#' `dates`.
+#' @param time_type string. The temporal resolution of the data (either "day" or
+#'  "week", depending on signal).
+#' @param time_values [`timeset`]. Dates or epiweeks to fetch. Defaults to all
+#'  ("*") dates.
 #' @param language string. Language to fetch.
 #' @param hours integer. Optionally, the hours to fetch.
 #' @param fetch_args [`fetch_args`]. Additional arguments to pass to `fetch()`.
@@ -2030,14 +2198,27 @@ pvt_twitter <- function(auth, locations, ..., dates = NULL, epiweeks = NULL, fet
 pub_wiki <- function(
     articles,
     ...,
-    dates = NULL,
-    epiweeks = NULL,
+    time_type = c("day", "week"),
+    time_values = "*",
     hours = NULL,
     language = "en",
     fetch_args = fetch_args_list()) {
   rlang::check_dots_empty()
 
+  time_type <- match.arg(time_type)
+  if (time_type == "day") {
+    dates <- time_values
+    epiweeks <- NULL
+    dates <- get_wildcard_equivalent_dates(dates, "day")
+  } else {
+    dates <- NULL
+    epiweeks <- time_values
+    epiweeks <- get_wildcard_equivalent_dates(epiweeks, "week")
+  }
+
   assert_character_param("articles", articles)
+  assert_character_param("time_type", time_type, len = 1)
+  assert_timeset_param("time_values", time_values)
   assert_timeset_param("dates", dates, required = FALSE)
   assert_timeset_param("epiweeks", epiweeks, required = FALSE)
   assert_integerish_param("hours", hours, required = FALSE)
@@ -2045,9 +2226,6 @@ pub_wiki <- function(
   dates <- parse_timeset_input(dates)
   epiweeks <- parse_timeset_input(epiweeks)
 
-  if (!xor(is.null(dates), is.null(epiweeks))) {
-    stop("exactly one of `dates` and `epiweeks` is required")
-  }
   time_field <- if (!is.null(dates)) {
     create_epidata_field_info("date", "date")
   } else {
diff --git a/R/model.R b/R/model.R
index a14f8960..38008262 100644
--- a/R/model.R
+++ b/R/model.R
@@ -61,6 +61,27 @@ epirange <- function(from, to) {
   structure(list(from = from, to = to), class = "EpiRange")
 }
 
+#' helper to convert an epirange from week to day or vice versa
+#'
+#' @keywords internal
+reformat_epirange <- function(epirange, to_type = c("day", "week")) {
+  to_type <- match.arg(to_type)
+
+  # Day format -> week
+  if (nchar(epirange$from) == 8 && to_type == "week") {
+    return(
+      epirange(date_to_epiweek(epirange$from), date_to_epiweek(epirange$to))
+    )
+    # Week format -> day
+  } else if (nchar(epirange$from) == 6 && to_type == "day") {
+    return(
+      epirange(parse_api_week(epirange$from), parse_api_week(epirange$to))
+    )
+  }
+
+  return(epirange)
+}
+
 #' @export
 print.EpiRange <- function(x, ...) {
   if (nchar(x$from) == 8) {
@@ -199,6 +220,20 @@ parse_data_frame <- function(epidata_call, df, disable_date_parsing = FALSE) {
   df
 }
 
+#' Converts a date (integer or character) to an epiweek
+#' @param value date (integer or character, with format YYYYMMDD) to be converted to an epiweek
+#' @return an integer representing an epiweek, in the format YYYYWW
+#' @importFrom MMWRweek MMWRweek
+#' @keywords internal
+date_to_epiweek <- function(value) {
+  date_components <- MMWRweek::MMWRweek(as.Date(as.character(value), "%Y%m%d"))
+  as.numeric(paste0(
+    date_components$MMWRyear,
+    # Pad with zeroes up to 2 digits (x -> 0x)
+    formatC(date_components$MMWRweek, width = 2, flag = 0)
+  ))
+}
+
 #' @keywords internal
 parse_api_date <- function(value) {
   as.Date(as.character(value), tryFormats = c("%Y%m%d", "%Y-%m-%d"))
diff --git a/R/utils.R b/R/utils.R
index eed7c88f..705ff368 100644
--- a/R/utils.R
+++ b/R/utils.R
@@ -44,3 +44,20 @@ check_is_cachable <- function(epidata_call, fetch_args) {
   )
   return(is_cachable)
 }
+
+#' helper to convert a date wildcard ("*") to an appropriate epirange
+#'
+#' @keywords internal
+get_wildcard_equivalent_dates <- function(time_value, time_type = c("day", "week")) {
+  time_type <- match.arg(time_type)
+
+  if (identical(time_value, "*")) {
+    if (time_type == "day") {
+      # To get all dates, set start and end dates to extreme values.
+      time_value <- epirange(10000101, 30000101)
+    } else if (time_type == "week") {
+      time_value <- epirange(100001, 300001)
+    }
+  }
+  return(time_value)
+}
diff --git a/man/date_to_epiweek.Rd b/man/date_to_epiweek.Rd
new file mode 100644
index 00000000..7f1f4262
--- /dev/null
+++ b/man/date_to_epiweek.Rd
@@ -0,0 +1,18 @@
+% Generated by roxygen2: do not edit by hand
+% Please edit documentation in R/model.R
+\name{date_to_epiweek}
+\alias{date_to_epiweek}
+\title{Converts a date (integer or character) to an epiweek}
+\usage{
+date_to_epiweek(value)
+}
+\arguments{
+\item{value}{date (integer or character, with format YYYYMMDD) to be converted to an epiweek}
+}
+\value{
+an integer representing an epiweek, in the format YYYYWW
+}
+\description{
+Converts a date (integer or character) to an epiweek
+}
+\keyword{internal}
diff --git a/man/get_wildcard_equivalent_dates.Rd b/man/get_wildcard_equivalent_dates.Rd
new file mode 100644
index 00000000..590a4745
--- /dev/null
+++ b/man/get_wildcard_equivalent_dates.Rd
@@ -0,0 +1,12 @@
+% Generated by roxygen2: do not edit by hand
+% Please edit documentation in R/utils.R
+\name{get_wildcard_equivalent_dates}
+\alias{get_wildcard_equivalent_dates}
+\title{helper to convert a date wildcard ("*") to an appropriate epirange}
+\usage{
+get_wildcard_equivalent_dates(time_value, time_type = c("day", "week"))
+}
+\description{
+helper to convert a date wildcard ("*") to an appropriate epirange
+}
+\keyword{internal}
diff --git a/man/pub_covid_hosp_facility.Rd b/man/pub_covid_hosp_facility.Rd
index 46d6f51e..59f4ff9b 100644
--- a/man/pub_covid_hosp_facility.Rd
+++ b/man/pub_covid_hosp_facility.Rd
@@ -6,7 +6,7 @@
 \usage{
 pub_covid_hosp_facility(
   hospital_pks,
-  collection_weeks,
+  collection_weeks = "*",
   ...,
   publication_dates = NULL,
   fetch_args = fetch_args_list()
@@ -15,7 +15,8 @@ pub_covid_hosp_facility(
 \arguments{
 \item{hospital_pks}{character. Facility identifiers.}
 
-\item{collection_weeks}{\code{\link{timeset}}. Epiweeks to fetch.}
+\item{collection_weeks}{\code{\link{timeset}}. Dates (corresponding to epiweeks) to
+fetch. Defaults to all ("*") dates.}
 
 \item{...}{not used for values, forces later arguments to bind by name}
 
@@ -45,6 +46,11 @@ pub_covid_hosp_facility(
   hospital_pks = "100075",
   collection_weeks = epirange(20200101, 20200501)
 )
+
+pub_covid_hosp_facility(
+  hospital_pks = "100075",
+  collection_weeks = epirange(202001, 202005)
+)
 }
 }
 \seealso{
diff --git a/man/pub_covid_hosp_state_timeseries.Rd b/man/pub_covid_hosp_state_timeseries.Rd
index 2823f6da..246bf7b1 100644
--- a/man/pub_covid_hosp_state_timeseries.Rd
+++ b/man/pub_covid_hosp_state_timeseries.Rd
@@ -6,7 +6,7 @@
 \usage{
 pub_covid_hosp_state_timeseries(
   states,
-  dates,
+  dates = "*",
   ...,
   as_of = NULL,
   issues = NULL,
@@ -16,7 +16,7 @@ pub_covid_hosp_state_timeseries(
 \arguments{
 \item{states}{character. Two letter state abbreviations.}
 
-\item{dates}{\code{\link{timeset}}. Dates to fetch.}
+\item{dates}{\code{\link{timeset}}. Dates to fetch. Defaults to all ("*") dates.}
 
 \item{...}{not used for values, forces later arguments to bind by name}
 
diff --git a/man/pub_covidcast.Rd b/man/pub_covidcast.Rd
index 0d87bcd6..65fb736f 100644
--- a/man/pub_covidcast.Rd
+++ b/man/pub_covidcast.Rd
@@ -9,8 +9,8 @@ pub_covidcast(
   signals,
   geo_type,
   time_type,
-  geo_values,
-  time_values,
+  geo_values = "*",
+  time_values = "*",
   ...,
   as_of = NULL,
   issues = NULL,
@@ -35,7 +35,7 @@ pub_covidcast(
 all. (See:
 \url{https://cmu-delphi.github.io/delphi-epidata/api/covidcast_geography.html}.)}
 
-\item{time_values}{\code{\link{timeset}}. Dates to fetch.}
+\item{time_values}{\code{\link{timeset}}. Dates to fetch. Defaults to all ("*") dates.}
 
 \item{...}{not used for values, forces later arguments to bind by name}
 
diff --git a/man/pub_delphi.Rd b/man/pub_delphi.Rd
index 4613ad6c..fe278beb 100644
--- a/man/pub_delphi.Rd
+++ b/man/pub_delphi.Rd
@@ -9,7 +9,8 @@ pub_delphi(system, epiweek, fetch_args = fetch_args_list())
 \arguments{
 \item{system}{character. System name to fetch.}
 
-\item{epiweek}{\code{\link{timeset}}. Epiweeks to fetch.}
+\item{epiweek}{\code{\link{timeset}}. Epiweek to fetch. Does not support multiple dates.
+Make separate calls to fetch data for multiple epiweeks.}
 
 \item{fetch_args}{\code{\link{fetch_args}}. Additional arguments to pass to \code{fetch()}.}
 }
diff --git a/man/pub_dengue_nowcast.Rd b/man/pub_dengue_nowcast.Rd
index f3709faf..e1c2573c 100644
--- a/man/pub_dengue_nowcast.Rd
+++ b/man/pub_dengue_nowcast.Rd
@@ -4,12 +4,12 @@
 \alias{pub_dengue_nowcast}
 \title{Delphi's PAHO dengue nowcasts (North and South America)}
 \usage{
-pub_dengue_nowcast(locations, epiweeks, fetch_args = fetch_args_list())
+pub_dengue_nowcast(locations, epiweeks = "*", fetch_args = fetch_args_list())
 }
 \arguments{
 \item{locations}{character. Locations to fetch.}
 
-\item{epiweeks}{\code{\link{timeset}}. Epiweeks to fetch.}
+\item{epiweeks}{\code{\link{timeset}}. Epiweeks to fetch. Defaults to all ("*") dates.}
 
 \item{fetch_args}{\code{\link{fetch_args}}. Additional arguments to pass to \code{fetch()}.}
 }
diff --git a/man/pub_ecdc_ili.Rd b/man/pub_ecdc_ili.Rd
index 7546d28f..d71b5651 100644
--- a/man/pub_ecdc_ili.Rd
+++ b/man/pub_ecdc_ili.Rd
@@ -6,7 +6,7 @@
 \usage{
 pub_ecdc_ili(
   regions,
-  epiweeks,
+  epiweeks = "*",
   ...,
   issues = NULL,
   lag = NULL,
@@ -16,7 +16,7 @@ pub_ecdc_ili(
 \arguments{
 \item{regions}{character. Regions to fetch.}
 
-\item{epiweeks}{\code{\link{timeset}}. Epiweeks to fetch.}
+\item{epiweeks}{\code{\link{timeset}}. Epiweeks to fetch. Defaults to all ("*") dates.}
 
 \item{...}{not used for values, forces later arguments to bind by name}
 
diff --git a/man/pub_flusurv.Rd b/man/pub_flusurv.Rd
index 8d15ccfb..e8fd5bb0 100644
--- a/man/pub_flusurv.Rd
+++ b/man/pub_flusurv.Rd
@@ -6,7 +6,7 @@
 \usage{
 pub_flusurv(
   locations,
-  epiweeks,
+  epiweeks = "*",
   ...,
   issues = NULL,
   lag = NULL,
@@ -16,7 +16,7 @@ pub_flusurv(
 \arguments{
 \item{locations}{character. Character vector indicating location.}
 
-\item{epiweeks}{\code{\link{timeset}}. Epiweeks to fetch.}
+\item{epiweeks}{\code{\link{timeset}}. Epiweeks to fetch. Defaults to all ("*") dates.}
 
 \item{...}{not used for values, forces later arguments to bind by name}
 
diff --git a/man/pub_fluview.Rd b/man/pub_fluview.Rd
index 30c47449..61ba357a 100644
--- a/man/pub_fluview.Rd
+++ b/man/pub_fluview.Rd
@@ -6,7 +6,7 @@
 \usage{
 pub_fluview(
   regions,
-  epiweeks,
+  epiweeks = "*",
   ...,
   issues = NULL,
   lag = NULL,
@@ -21,7 +21,7 @@ on. Full list link below.}
 
 \item{epiweeks}{\code{\link{timeset}}. Epiweeks to fetch in the form
 \code{epirange(startweek, endweek)}, where startweek and endweek are of the form
-YYYYWW (string or numeric).}
+YYYYWW (string or numeric). Defaults to all ("*") dates.}
 
 \item{...}{not used for values, forces later arguments to bind by name}
 
diff --git a/man/pub_fluview_clinical.Rd b/man/pub_fluview_clinical.Rd
index db2eccbf..a4017c76 100644
--- a/man/pub_fluview_clinical.Rd
+++ b/man/pub_fluview_clinical.Rd
@@ -6,7 +6,7 @@
 \usage{
 pub_fluview_clinical(
   regions,
-  epiweeks,
+  epiweeks = "*",
   ...,
   issues = NULL,
   lag = NULL,
@@ -18,7 +18,7 @@ pub_fluview_clinical(
 
 \item{epiweeks}{\code{\link{timeset}}. Epiweeks to fetch in the form
 epirange(startweek,endweek), where startweek and endweek are of the form
-YYYYWW (string or numeric).}
+YYYYWW (string or numeric). Defaults to all ("*") dates.}
 
 \item{...}{not used for values, forces later arguments to bind by name}
 
diff --git a/man/pub_gft.Rd b/man/pub_gft.Rd
index ed736232..c80d8d9a 100644
--- a/man/pub_gft.Rd
+++ b/man/pub_gft.Rd
@@ -4,12 +4,12 @@
 \alias{pub_gft}
 \title{Google Flu Trends flu search volume}
 \usage{
-pub_gft(locations, epiweeks, fetch_args = fetch_args_list())
+pub_gft(locations, epiweeks = "*", fetch_args = fetch_args_list())
 }
 \arguments{
 \item{locations}{character. Locations to fetch.}
 
-\item{epiweeks}{\code{\link{timeset}} Epiweeks to fetch.}
+\item{epiweeks}{\code{\link{timeset}} Epiweeks to fetch. Defaults to all ("*") dates.}
 
 \item{fetch_args}{\code{\link{fetch_args}}. Additional arguments to pass to \code{fetch()}.}
 }
diff --git a/man/pub_kcdc_ili.Rd b/man/pub_kcdc_ili.Rd
index c6f4ab8e..0c8b70f4 100644
--- a/man/pub_kcdc_ili.Rd
+++ b/man/pub_kcdc_ili.Rd
@@ -6,7 +6,7 @@
 \usage{
 pub_kcdc_ili(
   regions,
-  epiweeks,
+  epiweeks = "*",
   ...,
   issues = NULL,
   lag = NULL,
@@ -16,7 +16,7 @@ pub_kcdc_ili(
 \arguments{
 \item{regions}{character. Regions to fetch.}
 
-\item{epiweeks}{\code{\link{timeset}}. Epiweeks to fetch.}
+\item{epiweeks}{\code{\link{timeset}}. Epiweeks to fetch. Defaults to all ("*") dates.}
 
 \item{...}{not used for values, forces later arguments to bind by name}
 
diff --git a/man/pub_nidss_dengue.Rd b/man/pub_nidss_dengue.Rd
index 2f390ac8..67be9c94 100644
--- a/man/pub_nidss_dengue.Rd
+++ b/man/pub_nidss_dengue.Rd
@@ -4,12 +4,12 @@
 \alias{pub_nidss_dengue}
 \title{NIDSS dengue cases (Taiwan)}
 \usage{
-pub_nidss_dengue(locations, epiweeks, fetch_args = fetch_args_list())
+pub_nidss_dengue(locations, epiweeks = "*", fetch_args = fetch_args_list())
 }
 \arguments{
 \item{locations}{character. Locations to fetch.}
 
-\item{epiweeks}{\code{\link{timeset}}. Epiweeks to fetch.}
+\item{epiweeks}{\code{\link{timeset}}. Epiweeks to fetch. Defaults to all ("*") dates.}
 
 \item{fetch_args}{\code{\link{fetch_args}}. Additional arguments to pass to \code{fetch()}.}
 }
diff --git a/man/pub_nidss_flu.Rd b/man/pub_nidss_flu.Rd
index fc0e7d6d..946a1b87 100644
--- a/man/pub_nidss_flu.Rd
+++ b/man/pub_nidss_flu.Rd
@@ -6,7 +6,7 @@
 \usage{
 pub_nidss_flu(
   regions,
-  epiweeks,
+  epiweeks = "*",
   ...,
   issues = NULL,
   lag = NULL,
@@ -16,7 +16,7 @@ pub_nidss_flu(
 \arguments{
 \item{regions}{character. Regions to fetch.}
 
-\item{epiweeks}{\code{\link{timeset}}. Epiweeks to fetch.}
+\item{epiweeks}{\code{\link{timeset}}. Epiweeks to fetch. Defaults to all ("*") dates.}
 
 \item{...}{not used for values, forces later arguments to bind by name}
 
diff --git a/man/pub_nowcast.Rd b/man/pub_nowcast.Rd
index 13aa1a22..306c37f1 100644
--- a/man/pub_nowcast.Rd
+++ b/man/pub_nowcast.Rd
@@ -4,12 +4,12 @@
 \alias{pub_nowcast}
 \title{Delphi's ILI Nearby nowcasts}
 \usage{
-pub_nowcast(locations, epiweeks, fetch_args = fetch_args_list())
+pub_nowcast(locations, epiweeks = "*", fetch_args = fetch_args_list())
 }
 \arguments{
 \item{locations}{character. Locations to fetch.}
 
-\item{epiweeks}{\code{\link{timeset}}. Epiweeks to fetch.}
+\item{epiweeks}{\code{\link{timeset}}. Epiweeks to fetch. Defaults to all ("*") dates.}
 
 \item{fetch_args}{\code{\link{fetch_args}}. Additional arguments to pass to \code{fetch()}.}
 }
diff --git a/man/pub_paho_dengue.Rd b/man/pub_paho_dengue.Rd
index 773927b7..0d643f44 100644
--- a/man/pub_paho_dengue.Rd
+++ b/man/pub_paho_dengue.Rd
@@ -6,7 +6,7 @@
 \usage{
 pub_paho_dengue(
   regions,
-  epiweeks,
+  epiweeks = "*",
   ...,
   issues = NULL,
   lag = NULL,
@@ -16,7 +16,7 @@ pub_paho_dengue(
 \arguments{
 \item{regions}{character. Regions to fetch.}
 
-\item{epiweeks}{\code{\link{timeset}}. Epiweeks to fetch.}
+\item{epiweeks}{\code{\link{timeset}}. Epiweeks to fetch. Defaults to all ("*") dates.}
 
 \item{...}{not used for values, forces later arguments to bind by name}
 
diff --git a/man/pub_wiki.Rd b/man/pub_wiki.Rd
index 2669ff1a..278dca58 100644
--- a/man/pub_wiki.Rd
+++ b/man/pub_wiki.Rd
@@ -7,8 +7,8 @@
 pub_wiki(
   articles,
   ...,
-  dates = NULL,
-  epiweeks = NULL,
+  time_type = c("day", "week"),
+  time_values = "*",
   hours = NULL,
   language = "en",
   fetch_args = fetch_args_list()
@@ -19,10 +19,11 @@ pub_wiki(
 
 \item{...}{not used for values, forces later arguments to bind by name}
 
-\item{dates}{\code{\link{timeset}}. Dates to fetch. Mutually exclusive with \code{epiweeks}.}
+\item{time_type}{string. The temporal resolution of the data (either "day" or
+"week", depending on signal).}
 
-\item{epiweeks}{\code{\link{timeset}}. Epiweeks to fetch. Mutually exclusive with
-\code{dates}.}
+\item{time_values}{\code{\link{timeset}}. Dates or epiweeks to fetch. Defaults to all
+("*") dates.}
 
 \item{hours}{integer. Optionally, the hours to fetch.}
 
@@ -46,7 +47,11 @@ Number of page visits for selected English, Influenza-related wikipedia articles
 }
 \examples{
 \dontrun{
-pub_wiki(articles = "avian_influenza", epiweeks = epirange(201501, 201601))
+pub_wiki(
+  articles = "avian_influenza",
+  time_type = "week",
+  time_values = epirange(201501, 201601)
+)
 }
 }
 \keyword{endpoint}
diff --git a/man/pvt_cdc.Rd b/man/pvt_cdc.Rd
index 74497b29..35cc555b 100644
--- a/man/pvt_cdc.Rd
+++ b/man/pvt_cdc.Rd
@@ -4,14 +4,14 @@
 \alias{pvt_cdc}
 \title{CDC total and by topic webpage visits}
 \usage{
-pvt_cdc(auth, locations, epiweeks, fetch_args = fetch_args_list())
+pvt_cdc(auth, locations, epiweeks = "*", fetch_args = fetch_args_list())
 }
 \arguments{
 \item{auth}{string. Restricted access key (not the same as API key).}
 
 \item{locations}{character. Locations to fetch.}
 
-\item{epiweeks}{\code{\link{timeset}}. Epiweeks to fetch.}
+\item{epiweeks}{\code{\link{timeset}}. Epiweeks to fetch. Defaults to all ("*") dates.}
 
 \item{fetch_args}{\code{\link{fetch_args}}. Additional arguments to pass to \code{fetch()}.
 See \code{fetch_args_list()} for details.}
diff --git a/man/pvt_dengue_sensors.Rd b/man/pvt_dengue_sensors.Rd
index 560e9e4b..2ff7eb30 100644
--- a/man/pvt_dengue_sensors.Rd
+++ b/man/pvt_dengue_sensors.Rd
@@ -8,7 +8,7 @@ pvt_dengue_sensors(
   auth,
   names,
   locations,
-  epiweeks,
+  epiweeks = "*",
   fetch_args = fetch_args_list()
 )
 }
@@ -19,7 +19,7 @@ pvt_dengue_sensors(
 
 \item{locations}{character. Locations to fetch.}
 
-\item{epiweeks}{\code{\link{timeset}}. Epiweeks to fetch.}
+\item{epiweeks}{\code{\link{timeset}}. Epiweeks to fetch. Defaults to all ("*") dates.}
 
 \item{fetch_args}{\code{\link{fetch_args}}. Additional arguments to pass to \code{fetch()}.}
 }
diff --git a/man/pvt_ght.Rd b/man/pvt_ght.Rd
index cfa1038c..7a16f10c 100644
--- a/man/pvt_ght.Rd
+++ b/man/pvt_ght.Rd
@@ -4,14 +4,14 @@
 \alias{pvt_ght}
 \title{Google Health Trends health topics search volume}
 \usage{
-pvt_ght(auth, locations, epiweeks, query, fetch_args = fetch_args_list())
+pvt_ght(auth, locations, epiweeks = "*", query, fetch_args = fetch_args_list())
 }
 \arguments{
 \item{auth}{string. Restricted access key (not the same as API key).}
 
 \item{locations}{character. Locations to fetch.}
 
-\item{epiweeks}{\code{\link{timeset}}. Epiweeks to fetch.}
+\item{epiweeks}{\code{\link{timeset}}. Epiweeks to fetch. Defaults to all ("*") dates.}
 
 \item{query}{string. The query to be fetched.}
 
diff --git a/man/pvt_norostat.Rd b/man/pvt_norostat.Rd
index 837e16d8..24ffd778 100644
--- a/man/pvt_norostat.Rd
+++ b/man/pvt_norostat.Rd
@@ -4,14 +4,14 @@
 \alias{pvt_norostat}
 \title{CDC NoroSTAT norovirus outbreaks}
 \usage{
-pvt_norostat(auth, locations, epiweeks, fetch_args = fetch_args_list())
+pvt_norostat(auth, locations, epiweeks = "*", fetch_args = fetch_args_list())
 }
 \arguments{
 \item{auth}{string. Your authentication key.}
 
 \item{locations}{character. Locations to fetch.}
 
-\item{epiweeks}{\code{\link{timeset}}. Epiweeks to fetch.}
+\item{epiweeks}{\code{\link{timeset}}. Epiweeks to fetch. Defaults to all ("*") dates.}
 
 \item{fetch_args}{\code{\link{fetch_args}}. Additional arguments to pass to \code{fetch()}.}
 }
diff --git a/man/pvt_quidel.Rd b/man/pvt_quidel.Rd
index 909df751..10ca3c0a 100644
--- a/man/pvt_quidel.Rd
+++ b/man/pvt_quidel.Rd
@@ -4,14 +4,14 @@
 \alias{pvt_quidel}
 \title{Quidel COVID-19 and influenza testing data}
 \usage{
-pvt_quidel(auth, locations, epiweeks, fetch_args = fetch_args_list())
+pvt_quidel(auth, locations, epiweeks = "*", fetch_args = fetch_args_list())
 }
 \arguments{
 \item{auth}{string. Restricted access key (not the same as API key).}
 
 \item{locations}{character. Locations to fetch.}
 
-\item{epiweeks}{\code{\link{timeset}}. Epiweeks to fetch.}
+\item{epiweeks}{\code{\link{timeset}}. Epiweeks to fetch. Defaults to all ("*") dates.}
 
 \item{fetch_args}{\code{\link{fetch_args}}. Additional arguments to pass to \code{fetch()}.}
 }
diff --git a/man/pvt_sensors.Rd b/man/pvt_sensors.Rd
index 24073803..35e41bf0 100644
--- a/man/pvt_sensors.Rd
+++ b/man/pvt_sensors.Rd
@@ -4,7 +4,13 @@
 \alias{pvt_sensors}
 \title{Influenza and dengue digital surveillance sensors}
 \usage{
-pvt_sensors(auth, names, locations, epiweeks, fetch_args = fetch_args_list())
+pvt_sensors(
+  auth,
+  names,
+  locations,
+  epiweeks = "*",
+  fetch_args = fetch_args_list()
+)
 }
 \arguments{
 \item{auth}{string. Restricted access key (not the same as API key).}
@@ -13,7 +19,7 @@ pvt_sensors(auth, names, locations, epiweeks, fetch_args = fetch_args_list())
 
 \item{locations}{character. Locations to fetch.}
 
-\item{epiweeks}{\code{\link{timeset}}. Epiweeks to fetch.}
+\item{epiweeks}{\code{\link{timeset}}. Epiweeks to fetch. Defaults to all ("*") dates.}
 
 \item{fetch_args}{\code{\link{fetch_args}}. Additional arguments to pass to \code{fetch()}.}
 }
diff --git a/man/pvt_twitter.Rd b/man/pvt_twitter.Rd
index ffee87b2..b6c6e95f 100644
--- a/man/pvt_twitter.Rd
+++ b/man/pvt_twitter.Rd
@@ -8,8 +8,8 @@ pvt_twitter(
   auth,
   locations,
   ...,
-  dates = NULL,
-  epiweeks = NULL,
+  time_type = c("day", "week"),
+  time_values = "*",
   fetch_args = fetch_args_list()
 )
 }
@@ -20,10 +20,11 @@ pvt_twitter(
 
 \item{...}{not used for values, forces later arguments to bind by name}
 
-\item{dates}{\code{\link{timeset}}. Dates to fetch. Mutually exclusive with \code{epiweeks}.}
+\item{time_type}{string. The temporal resolution of the data (either "day" or
+"week", depending on signal).}
 
-\item{epiweeks}{\code{\link{timeset}}. Epiweeks to fetch. Mutually exclusive with
-\code{dates}.}
+\item{time_values}{\code{\link{timeset}}. Dates or epiweeks to fetch. Defaults to all
+("*") dates.}
 
 \item{fetch_args}{\code{\link{fetch_args}}. Additional arguments to pass to \code{fetch()}.}
 }
@@ -42,7 +43,8 @@ Delphi’s epidemiological data. Sourced from
 pvt_twitter(
   auth = Sys.getenv("SECRET_API_AUTH_TWITTER"),
   locations = "CA",
-  epiweeks = epirange(201501, 202001)
+  time_type = "week",
+  time_values = epirange(201501, 202001)
 )
 }
 }
diff --git a/man/reformat_epirange.Rd b/man/reformat_epirange.Rd
new file mode 100644
index 00000000..5341c521
--- /dev/null
+++ b/man/reformat_epirange.Rd
@@ -0,0 +1,12 @@
+% Generated by roxygen2: do not edit by hand
+% Please edit documentation in R/model.R
+\name{reformat_epirange}
+\alias{reformat_epirange}
+\title{helper to convert an epirange from week to day or vice versa}
+\usage{
+reformat_epirange(epirange, to_type = c("day", "week"))
+}
+\description{
+helper to convert an epirange from week to day or vice versa
+}
+\keyword{internal}
diff --git a/tests/testthat/test-endpoints.R b/tests/testthat/test-endpoints.R
index 53aca4cf..39194535 100644
--- a/tests/testthat/test-endpoints.R
+++ b/tests/testthat/test-endpoints.R
@@ -137,16 +137,246 @@ test_that("basic_epidata_call", {
   expect_no_error(pvt_twitter(
     auth = "yourkey",
     locations = "CA",
-    epiweeks = epirange(201501, 202001),
+    time_type = "week",
+    time_values = epirange(201501, 202001),
+    fetch_args = fetch_args_list(dry_run = TRUE)
+  ) %>% request_url())
+  expect_no_error(pvt_twitter(
+    auth = "yourkey",
+    locations = "CA",
+    time_type = "day",
+    time_values = epirange(20150101, 20200101),
     fetch_args = fetch_args_list(dry_run = TRUE)
   ) %>% request_url())
   expect_no_error(pub_wiki(
     articles = "avian_influenza",
-    epiweeks = epirange(201501, 202001),
+    time_type = "week",
+    time_values = epirange(201501, 202001),
+    fetch_args = fetch_args_list(dry_run = TRUE)
+  ) %>% request_url())
+  expect_no_error(pub_wiki(
+    articles = "avian_influenza",
+    time_type = "day",
+    time_values = epirange(20150101, 20200101),
     fetch_args = fetch_args_list(dry_run = TRUE)
   ) %>% request_url())
 })
 
+test_that("endoints accept wildcard for date parameter", {
+  expect_no_error(call <- pvt_cdc(
+    auth = "yourkey",
+    "fl,ca",
+    "*",
+    fetch_args = fetch_args_list(dry_run = TRUE)
+  ))
+  expect_identical(call$params$epiweeks$from, 100001)
+  expect_identical(call$params$epiweeks$to, 300001)
+
+  expect_identical(call$params$epiweeks$from, 100001)
+  expect_identical(call$params$epiweeks$to, 300001)
+
+  expect_no_error(call <- pub_covid_hosp_facility(
+    hospital_pks = "100075",
+    collection_weeks = "*",
+    fetch_args = fetch_args_list(dry_run = TRUE)
+  ))
+  expect_identical(call$params$collection_weeks$from, 10000101)
+  expect_identical(call$params$collection_weeks$to, 30000101)
+
+  expect_no_error(call <- pub_covid_hosp_state_timeseries(
+    states = "fl",
+    dates = "*",
+    fetch_args = fetch_args_list(dry_run = TRUE)
+  ))
+  expect_identical(call$params$dates$from, 10000101)
+  expect_identical(call$params$dates$to, 30000101)
+
+  expect_no_error(call <- pub_covidcast(
+    source = "jhu-csse",
+    signals = "confirmed_7dav_incidence_prop",
+    time_type = "day",
+    geo_type = "state",
+    time_values = "*",
+    geo_values = "ca,fl",
+    fetch_args = fetch_args_list(dry_run = TRUE)
+  ))
+  expect_identical(call$params$time_values, "*")
+
+  expect_no_error(call <- pub_dengue_nowcast(
+    locations = "ca",
+    epiweeks = "*",
+    fetch_args = fetch_args_list(dry_run = TRUE)
+  ))
+  expect_identical(call$params$epiweeks$from, 100001)
+  expect_identical(call$params$epiweeks$to, 300001)
+
+  expect_no_error(call <- pvt_dengue_sensors(
+    auth = "yourkey",
+    names = "ght",
+    locations = "ag",
+    epiweeks = "*",
+    fetch_args = fetch_args_list(dry_run = TRUE)
+  ))
+  expect_identical(call$params$epiweeks$from, 100001)
+  expect_identical(call$params$epiweeks$to, 300001)
+
+  expect_no_error(call <- pub_ecdc_ili(
+    regions = "austria",
+    epiweeks = "*",
+    fetch_args = fetch_args_list(dry_run = TRUE)
+  ))
+  expect_identical(call$params$epiweeks$from, 100001)
+  expect_identical(call$params$epiweeks$to, 300001)
+
+  expect_no_error(call <- pub_flusurv(
+    locations = "CA",
+    epiweeks = "*",
+    fetch_args = fetch_args_list(dry_run = TRUE)
+  ))
+  expect_identical(call$params$epiweeks$from, 100001)
+  expect_identical(call$params$epiweeks$to, 300001)
+
+  expect_no_error(call <- pub_fluview_clinical(
+    regions = "nat",
+    epiweeks = "*",
+    fetch_args = fetch_args_list(dry_run = TRUE)
+  ))
+  expect_identical(call$params$epiweeks$from, 100001)
+  expect_identical(call$params$epiweeks$to, 300001)
+
+  expect_no_error(call <- pub_fluview(
+    regions = "nat",
+    epiweeks = "*",
+    fetch_args = fetch_args_list(dry_run = TRUE)
+  ))
+  expect_identical(call$params$epiweeks$from, 100001)
+  expect_identical(call$params$epiweeks$to, 300001)
+
+  expect_no_error(call <- pub_gft(
+    locations = "hhs1",
+    epiweeks = "*",
+    fetch_args = fetch_args_list(dry_run = TRUE)
+  ))
+  expect_identical(call$params$epiweeks$from, 100001)
+  expect_identical(call$params$epiweeks$to, 300001)
+
+  expect_no_error(call <- pvt_ght(
+    auth = "yourkey",
+    locations = "ca",
+    epiweeks = "*",
+    query = "how to get over the flu",
+    fetch_args = fetch_args_list(dry_run = TRUE)
+  ))
+  expect_identical(call$params$epiweeks$from, 100001)
+  expect_identical(call$params$epiweeks$to, 300001)
+
+  expect_no_error(call <- pub_kcdc_ili(
+    regions = "ROK",
+    epiweeks = "*",
+    fetch_args = fetch_args_list(dry_run = TRUE)
+  ))
+  expect_identical(call$params$epiweeks$from, 100001)
+  expect_identical(call$params$epiweeks$to, 300001)
+
+  expect_no_error(call <- pub_nidss_dengue(
+    locations = "taipei",
+    epiweeks = "*",
+    fetch_args = fetch_args_list(dry_run = TRUE)
+  ))
+  expect_identical(call$params$epiweeks$from, 100001)
+  expect_identical(call$params$epiweeks$to, 300001)
+
+  expect_no_error(call <- pub_nidss_flu(
+    regions = "taipei",
+    epiweeks = "*",
+    fetch_args = fetch_args_list(dry_run = TRUE)
+  ))
+  expect_identical(call$params$epiweeks$from, 100001)
+  expect_identical(call$params$epiweeks$to, 300001)
+
+  expect_no_error(call <- pvt_norostat(
+    auth = "yourkey",
+    locations = "Minnesota, Ohio, Oregon, Tennessee, and Wisconsin",
+    epiweeks = "*",
+    fetch_args = fetch_args_list(dry_run = TRUE)
+  ))
+  expect_identical(call$params$epiweeks$from, 100001)
+  expect_identical(call$params$epiweeks$to, 300001)
+
+  expect_no_error(call <- pub_nowcast(
+    locations = "ca",
+    epiweeks = "*",
+    fetch_args = fetch_args_list(dry_run = TRUE)
+  ))
+  expect_identical(call$params$epiweeks$from, 100001)
+  expect_identical(call$params$epiweeks$to, 300001)
+
+  expect_no_error(call <- pub_paho_dengue(
+    regions = "ca",
+    epiweeks = "*",
+    fetch_args = fetch_args_list(dry_run = TRUE)
+  ))
+  expect_identical(call$params$epiweeks$from, 100001)
+  expect_identical(call$params$epiweeks$to, 300001)
+
+  expect_no_error(call <- pvt_quidel(
+    auth = "yourkey",
+    locations = "hhs1",
+    epiweeks = "*",
+    fetch_args = fetch_args_list(dry_run = TRUE)
+  ))
+  expect_identical(call$params$epiweeks$from, 100001)
+  expect_identical(call$params$epiweeks$to, 300001)
+
+  expect_no_error(call <- pvt_sensors(
+    auth = "yourkey",
+    names = "sar3",
+    locations = "nat",
+    epiweeks = "*",
+    fetch_args = fetch_args_list(dry_run = TRUE)
+  ))
+  expect_identical(call$params$epiweeks$from, 100001)
+  expect_identical(call$params$epiweeks$to, 300001)
+
+  expect_no_error(call <- pvt_twitter(
+    auth = "yourkey",
+    locations = "CA",
+    time_type = "week",
+    time_values = "*",
+    fetch_args = fetch_args_list(dry_run = TRUE)
+  ))
+  expect_identical(call$params$epiweeks$from, 100001)
+  expect_identical(call$params$epiweeks$to, 300001)
+
+  expect_no_error(call <- pvt_twitter(
+    auth = "yourkey",
+    locations = "CA",
+    time_type = "day",
+    time_values = "*",
+    fetch_args = fetch_args_list(dry_run = TRUE)
+  ))
+  expect_identical(call$params$dates$from, 10000101)
+  expect_identical(call$params$dates$to, 30000101)
+
+  expect_no_error(call <- pub_wiki(
+    articles = "avian_influenza",
+    time_type = "week",
+    time_values = "*",
+    fetch_args = fetch_args_list(dry_run = TRUE)
+  ))
+  expect_identical(call$params$epiweeks$from, 100001)
+  expect_identical(call$params$epiweeks$to, 300001)
+
+  expect_no_error(call <- pub_wiki(
+    articles = "avian_influenza",
+    time_type = "day",
+    time_values = "*",
+    fetch_args = fetch_args_list(dry_run = TRUE)
+  ))
+  expect_identical(call$params$dates$from, 10000101)
+  expect_identical(call$params$dates$to, 30000101)
+})
+
 test_that("endpoints fail when given args via dots", {
   dots_error <- "`...` must be empty"
 
@@ -236,13 +466,15 @@ test_that("endpoints fail when given args via dots", {
     pvt_twitter(
       auth = "yourkey",
       locations = "CA",
-      date_range = epirange(201501, 202001)
+      time_type = "week",
+      time_range = epirange(201501, 202001)
     ),
     regexp = dots_error
   )
   expect_error(
     pub_wiki(
       articles = "avian_influenza",
+      time_type = "week",
       date_range = epirange(201501, 202001)
     ),
     regexp = dots_error
diff --git a/tests/testthat/test-model.R b/tests/testthat/test-model.R
index 9f9b739c..453db0be 100644
--- a/tests/testthat/test-model.R
+++ b/tests/testthat/test-model.R
@@ -113,3 +113,47 @@ test_that("parse_api_date accepts YYYYMMDD and YYYY-MM-DD", {
 test_that("parse_api_date handles missing values appropriately", {
   expect_identical(parse_api_date(NA), as.Date(NA))
 })
+
+test_that("date_to_epiweek accepts str and int input", {
+  expect_identical(date_to_epiweek("20200101"), 202001)
+  expect_identical(date_to_epiweek(20200101), 202001)
+})
+
+test_that("date_to_epiweek accepts single and double-digit weeks", {
+  expect_identical(date_to_epiweek(20201101), 202045)
+  expect_identical(date_to_epiweek(20200109), 202002)
+})
+
+test_that("reformat_epirange works in basic cases", {
+  # Week to week
+  result <- reformat_epirange(epirange(202002, 202013), "week")
+  expect_identical(result, epirange(202002, 202013))
+
+  result <- reformat_epirange(epirange("202002", "202013"), "week")
+  expect_identical(result, epirange("202002", "202013"))
+
+  # Week to day
+  # Across year boundary
+  result <- reformat_epirange(epirange(202001, 202013), "day")
+  expect_identical(result, epirange(20191229, 20200322))
+
+  result <- reformat_epirange(epirange(202002, 202013), "day")
+  expect_identical(result, epirange(20200105, 20200322))
+
+  result <- reformat_epirange(epirange("202002", "202013"), "day")
+  expect_identical(result, epirange(20200105, 20200322))
+
+  # Day to week
+  result <- reformat_epirange(epirange(20200201, 20201031), "week")
+  expect_identical(result, epirange(202005, 202044))
+
+  result <- reformat_epirange(epirange("20200201", "20201031"), "week")
+  expect_identical(result, epirange(202005, 202044))
+
+  # Day to day
+  result <- reformat_epirange(epirange(20200201, 20201031), "day")
+  expect_identical(result, epirange(20200201, 20201031))
+
+  result <- reformat_epirange(epirange("20200201", "20201031"), "day")
+  expect_identical(result, epirange("20200201", "20201031"))
+})
diff --git a/tests/testthat/test-utils.R b/tests/testthat/test-utils.R
index fb5cfbe5..a95fbfe0 100644
--- a/tests/testthat/test-utils.R
+++ b/tests/testthat/test-utils.R
@@ -64,3 +64,27 @@ test_that("check_is_cachable can handle both str and date inputs of various leng
   epidata_call$params$issues <- epirange(as.Date("2022-01-01"), as.Date("2022-02-01"))
   expect_no_error(check_is_cachable(epidata_call, fetch_args))
 })
+
+test_that("get_wildcard_equivalent_dates works in basic cases", {
+  # Week date
+  result <- get_wildcard_equivalent_dates(epirange(202002, 202013), "week")
+  expect_identical(result, epirange(202002, 202013))
+
+  result <- get_wildcard_equivalent_dates(epirange("202002", "202013"), "week")
+  expect_identical(result, epirange("202002", "202013"))
+
+  # Week wildcard
+  result <- get_wildcard_equivalent_dates("*", "week")
+  expect_identical(result, epirange(100001, 300001))
+
+  # Day date
+  result <- get_wildcard_equivalent_dates(epirange(20200201, 20201031), "day")
+  expect_identical(result, epirange(20200201, 20201031))
+
+  result <- get_wildcard_equivalent_dates(epirange("20200201", "20201031"), "day")
+  expect_identical(result, epirange("20200201", "20201031"))
+
+  # Day wildcard
+  result <- get_wildcard_equivalent_dates("*", "day")
+  expect_identical(result, epirange(10000101, 30000101))
+})
diff --git a/vignettes/signal-discovery.Rmd b/vignettes/signal-discovery.Rmd
index 8cd7799c..70a081ae 100644
--- a/vignettes/signal-discovery.Rmd
+++ b/vignettes/signal-discovery.Rmd
@@ -31,9 +31,9 @@ The site also includes a search tool if you have a keyword (e.g. "Taiwan") in mi
 
 ## Signal metadata
 
-Some endpoints have partner metadata available that, depending on
-the endpoint, provides information about the signals that are available, what
-time ranges they are available for, and when they have been updated.
+Some endpoints have partner metadata available that provides information about
+the signals that are available, for example, what time ranges they are
+available for, and when they have been updated.
 
 ```{r, echo = FALSE}
 suppressMessages(invisible(capture.output(endpts <- avail_endpoints())))
@@ -282,7 +282,12 @@ pub_paho_dengue(regions = "ca", epiweeks = epirange(200201, 202319))
 API docs: <https://cmu-delphi.github.io/delphi-epidata/api/wiki.html>
 
 ```{r, eval = FALSE}
-pub_wiki(language = "en", articles = "influenza", epiweeks = epirange(202001, 202319))
+pub_wiki(
+  language = "en",
+  articles = "influenza",
+  time_type = "week",
+  time_values = epirange(202001, 202319)
+)
 ```
 
 ### Private methods
@@ -290,6 +295,10 @@ pub_wiki(language = "en", articles = "influenza", epiweeks = epirange(202001, 20
 These require private access keys to use (separate from the Delphi Epidata API key).
 To actually run these locally, you will need to store these secrets in your `.Reviron` file, or set them as environmental variables.
 
+<details id="private-endpoints">
+
+<summary>Usage of private endpoints</summary>
+
 #### CDC
 
 API docs: <https://cmu-delphi.github.io/delphi-epidata/api/cdc.html>
@@ -369,6 +378,9 @@ API docs: <https://cmu-delphi.github.io/delphi-epidata/api/twitter.html>
 pvt_twitter(
   auth = Sys.getenv("SECRET_API_AUTH_TWITTER"),
   locations = "nat",
-  epiweeks = epirange(200301, 202105)
+  time_type = "week",
+  time_values = epirange(200301, 202105)
 )
 ```
+
+</details>