time: Pivot year used when parsing two digit years is not documented.

[takeyourhatoff]

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

$ go version
go version go1.13.3 darwin/amd64

Does this issue reproduce with the latest release?

Yes

What did you do?

Try to parse dates with two digit years.
https://play.golang.org/p/CdUxdDqG8mF

What did you expect to see?

Documentation regarding the pivot year used when parsing two digit years.

What did you see instead?

No mention of the pivot year used.

[ianlancetaylor]

The pivot year is 1969 (two-digit-year >= 69 => add 1900, < 69 => add 2000). I agree that this should be documented somewhere, perhaps in the doc comment for time.Parse.

[gopherbot]

Change https://golang.org/cl/214980 mentions this issue: Update documentation(#36549)