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Date: Fri, 21 Oct 2016 12:18:22 -0400
From: Rich Felker <>
Subject: Re: musl's strptime does not support POSIX %U/%W

On Fri, Oct 21, 2016 at 11:00:35AM +0200, Raphael 'kena' Poss wrote:
> Hi all,
> we at CockroachDB would like to integrate strptime, but some of our
> users on Alpine Linux discovered that musl's strptime doesn't live up to
> expectations:
> conv_test.go:58: strptime("2018 10 4", "%Y %W %w"): got
> "2017-12-31T00:00:00Z", expected "2018-03-08T00:00:00Z"
> conv_test.go:58: strptime("2018 10 4", "%Y %U %w"): got
> "2017-12-31T00:00:00Z", expected "2018-03-15T00:00:00Z"
> Indeed there's a FIXME in there:
> We've filed this internally as
> As of this day this is the only known limitation that prevents
> compatibility of CockroachDB with musl. If you have any suggestions /
> input we'd be glad to receive them!

Indeed, somehow I thought this FIXME had been fixed a long time ago,
but it seems it hasn't. I'll see if we can get it added soon.


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