diff --git a/libcxx/test/std/time/time.zone/time.zone.db/time.zone.db.access/get_tzdb.pass.cpp b/libcxx/test/std/time/time.zone/time.zone.db/time.zone.db.access/get_tzdb.pass.cpp
index 335e8d20c2391..b6204c615d965 100644
--- a/libcxx/test/std/time/time.zone/time.zone.db/time.zone.db.access/get_tzdb.pass.cpp
+++ b/libcxx/test/std/time/time.zone/time.zone.db/time.zone.db.access/get_tzdb.pass.cpp
@@ -12,9 +12,6 @@
 // XFAIL: libcpp-has-no-incomplete-tzdb
 // XFAIL: availability-tzdb-missing
 
-// TODO TZDB (#81654) Enable tests
-// UNSUPPORTED: c++20, c++23, c++26
-
 // <chrono>
 
 // const tzdb& get_tzdb();
@@ -30,8 +27,6 @@ int main(int, const char**) {
 
   assert(!db.version.empty());
 
-  LIBCPP_ASSERT(!db.__rules.empty());
-
   assert(!db.zones.empty());
   assert(std::ranges::is_sorted(db.zones));
   assert(std::ranges::adjacent_find(db.zones) == db.zones.end()); // is unique?
diff --git a/libcxx/test/std/time/time.zone/time.zone.db/time.zone.db.access/get_tzdb_list.pass.cpp b/libcxx/test/std/time/time.zone/time.zone.db/time.zone.db.access/get_tzdb_list.pass.cpp
index 34af9b576361f..a5579a3820b6a 100644
--- a/libcxx/test/std/time/time.zone/time.zone.db/time.zone.db.access/get_tzdb_list.pass.cpp
+++ b/libcxx/test/std/time/time.zone/time.zone.db/time.zone.db.access/get_tzdb_list.pass.cpp
@@ -12,9 +12,6 @@
 // XFAIL: libcpp-has-no-incomplete-tzdb
 // XFAIL: availability-tzdb-missing
 
-// TODO TZDB (#81654) Enable tests
-// UNSUPPORTED: c++20, c++23, c++26
-
 // <chrono>
 
 // const tzdb& get_tzdb_list();
diff --git a/libcxx/test/std/time/time.zone/time.zone.db/time.zone.db.list/front.pass.cpp b/libcxx/test/std/time/time.zone/time.zone.db/time.zone.db.list/front.pass.cpp
index ac5fee8183b9b..12c5310772f6a 100644
--- a/libcxx/test/std/time/time.zone/time.zone.db/time.zone.db.list/front.pass.cpp
+++ b/libcxx/test/std/time/time.zone/time.zone.db/time.zone.db.list/front.pass.cpp
@@ -12,9 +12,6 @@
 // XFAIL: libcpp-has-no-incomplete-tzdb
 // XFAIL: availability-tzdb-missing
 
-// TODO TZDB (#81654) Enable tests
-// UNSUPPORTED: c++20, c++23, c++26
-
 // <chrono>
 //
 // class tzdb_list;
diff --git a/libcxx/test/std/time/time.zone/time.zone.db/time.zone.db.list/iterators.pass.cpp b/libcxx/test/std/time/time.zone/time.zone.db/time.zone.db.list/iterators.pass.cpp
index 8bd9b321b2a0f..b00b8b44188d0 100644
--- a/libcxx/test/std/time/time.zone/time.zone.db/time.zone.db.list/iterators.pass.cpp
+++ b/libcxx/test/std/time/time.zone/time.zone.db/time.zone.db.list/iterators.pass.cpp
@@ -12,9 +12,6 @@
 // XFAIL: libcpp-has-no-incomplete-tzdb
 // XFAIL: availability-tzdb-missing
 
-// TODO TZDB (#81654) Enable tests
-// UNSUPPORTED: c++20, c++23, c++26
-
 // <chrono>
 //
 // class tzdb_list;
diff --git a/libcxx/test/std/time/time.zone/time.zone.db/time.zone.db.remote/reload_tzdb.pass.cpp b/libcxx/test/std/time/time.zone/time.zone.db/time.zone.db.remote/reload_tzdb.pass.cpp
index bbf9002c0430c..af38772ee3cb2 100644
--- a/libcxx/test/std/time/time.zone/time.zone.db/time.zone.db.remote/reload_tzdb.pass.cpp
+++ b/libcxx/test/std/time/time.zone/time.zone.db/time.zone.db.remote/reload_tzdb.pass.cpp
@@ -12,9 +12,6 @@
 // XFAIL: libcpp-has-no-incomplete-tzdb
 // XFAIL: availability-tzdb-missing
 
-// TODO TZDB (#81654) Enable tests
-// UNSUPPORTED: c++20, c++23, c++26
-
 // <chrono>
 
 // Note there is no Standard way to change the remote database used.
diff --git a/libcxx/test/std/time/time.zone/time.zone.db/time.zone.db.remote/remote_version.pass.cpp b/libcxx/test/std/time/time.zone/time.zone.db/time.zone.db.remote/remote_version.pass.cpp
index 861075cd82aa6..36b68cefc8d31 100644
--- a/libcxx/test/std/time/time.zone/time.zone.db/time.zone.db.remote/remote_version.pass.cpp
+++ b/libcxx/test/std/time/time.zone/time.zone.db/time.zone.db.remote/remote_version.pass.cpp
@@ -12,9 +12,6 @@
 // XFAIL: libcpp-has-no-incomplete-tzdb
 // XFAIL: availability-tzdb-missing
 
-// TODO TZDB (#81654) Enable tests
-// UNSUPPORTED: c++20, c++23, c++26
-
 // <chrono>
 
 // const string remote_version();
diff --git a/libcxx/test/std/time/time.zone/time.zone.link/time.zone.link.members/name.pass.cpp b/libcxx/test/std/time/time.zone/time.zone.link/time.zone.link.members/name.pass.cpp
index 95d86d586666e..c2412bac461bc 100644
--- a/libcxx/test/std/time/time.zone/time.zone.link/time.zone.link.members/name.pass.cpp
+++ b/libcxx/test/std/time/time.zone/time.zone.link/time.zone.link.members/name.pass.cpp
@@ -12,9 +12,6 @@
 // XFAIL: libcpp-has-no-incomplete-tzdb
 // XFAIL: availability-tzdb-missing
 
-// TODO TZDB (#81654) Enable tests
-// UNSUPPORTED: c++20, c++23, c++26
-
 // <chrono>
 
 // class time_zone_link;
diff --git a/libcxx/test/std/time/time.zone/time.zone.link/time.zone.link.members/target.pass.cpp b/libcxx/test/std/time/time.zone/time.zone.link/time.zone.link.members/target.pass.cpp
index 305fbd21f625b..2f8b5b9421d63 100644
--- a/libcxx/test/std/time/time.zone/time.zone.link/time.zone.link.members/target.pass.cpp
+++ b/libcxx/test/std/time/time.zone/time.zone.link/time.zone.link.members/target.pass.cpp
@@ -12,9 +12,6 @@
 // XFAIL: libcpp-has-no-incomplete-tzdb
 // XFAIL: availability-tzdb-missing
 
-// TODO TZDB (#81654) Enable tests
-// UNSUPPORTED: c++20, c++23, c++26
-
 // <chrono>
 
 // class time_zone_link;
diff --git a/libcxx/test/std/time/time.zone/time.zone.link/time.zone.link.nonmembers/comparison.pass.cpp b/libcxx/test/std/time/time.zone/time.zone.link/time.zone.link.nonmembers/comparison.pass.cpp
index e375d7e443ce4..944818c1ad0c1 100644
--- a/libcxx/test/std/time/time.zone/time.zone.link/time.zone.link.nonmembers/comparison.pass.cpp
+++ b/libcxx/test/std/time/time.zone/time.zone.link/time.zone.link.nonmembers/comparison.pass.cpp
@@ -12,9 +12,6 @@
 // XFAIL: libcpp-has-no-incomplete-tzdb
 // XFAIL: availability-tzdb-missing
 
-// TODO TZDB (#81654) Enable tests
-// UNSUPPORTED: c++20, c++23, c++26
-
 // <chrono>
 
 // bool operator==(const time_zone_link& x, const time_zone_link& y) noexcept;
diff --git a/libcxx/test/std/time/time.zone/time.zone.timezone/time.zone.members/name.pass.cpp b/libcxx/test/std/time/time.zone/time.zone.timezone/time.zone.members/name.pass.cpp
index 2bbe714b71a68..d1ff2fe683108 100644
--- a/libcxx/test/std/time/time.zone/time.zone.timezone/time.zone.members/name.pass.cpp
+++ b/libcxx/test/std/time/time.zone/time.zone.timezone/time.zone.members/name.pass.cpp
@@ -12,9 +12,6 @@
 // XFAIL: libcpp-has-no-incomplete-tzdb
 // XFAIL: availability-tzdb-missing
 
-// TODO TZDB (#81654) Enable tests
-// UNSUPPORTED: c++20, c++23, c++26
-
 // <chrono>
 
 // class time_zone;
diff --git a/libcxx/test/std/time/time.zone/time.zone.timezone/time.zone.nonmembers/comparison.pass.cpp b/libcxx/test/std/time/time.zone/time.zone.timezone/time.zone.nonmembers/comparison.pass.cpp
index 9eae91e80a42d..7c680707bc518 100644
--- a/libcxx/test/std/time/time.zone/time.zone.timezone/time.zone.nonmembers/comparison.pass.cpp
+++ b/libcxx/test/std/time/time.zone/time.zone.timezone/time.zone.nonmembers/comparison.pass.cpp
@@ -12,9 +12,6 @@
 // XFAIL: libcpp-has-no-incomplete-tzdb
 // XFAIL: availability-tzdb-missing
 
-// TODO TZDB (#81654) Enable tests
-// UNSUPPORTED: c++20, c++23, c++26
-
 // <chrono>
 
 // bool operator==(const time_zone& x, const time_zone& y) noexcept;