time/format: Error parsing time format with European offset

[haskovec]

What version of Go are you using (go version)?

$ go version

go version go1.15.6 darwin/amd64

Does this issue reproduce with the latest release?

What operating system and processor architecture are you using (go env)?

go env Output

$ go env

What did you do?

When I try to parse a time returned by a workfront instance with a European time offset Go fails to parse it. The time format returned is 2020-08-17T17:00:00:000+0100

To reproduce I wrote the following test code:

func TestWorkfrontDateFormat(t *testing.T) {
	workfrontDate := "2020-08-17T17:00:00:000+0100"  //Set for European timezone

	_, err := time.Parse("2006-01-02T15:04:50:000-0700", workfrontDate)
	if err != nil {
		t.Errorf("Error parsing European Date: %#v", err)
	}
}

What did you expect to see?

I would expect it to correctly parse the time.

What did you see instead?

It returns an error object:

&time.ParseError{Layout:"2006-01-02T15:04:50:000-0700", Value:"2020-08-17T17:00:00:000+0100", LayoutElem:"0:000", ValueElem:":000+0100", Message:""}

[seankhliao]

closed as dup of #36145 , please comment/reopen if you disagree

[gopherbot]

Change https://golang.org/cl/300996 mentions this issue: time: support "," as separator for fractional seconds