GNU bug report logs - #48085
date -d greater than 23 years ago gives error invalid date

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From: Mark Krenz <mark <at> slugbug.org>
To: 48085 <at> debbugs.gnu.org
Subject: bug#48085: date -d greater than 23 years ago gives error invalid date
Date: Wed, 28 Apr 2021 23:23:24 +0000

  Well it seems that this might actually be related to timezone database
files. My timezone is America/Indianapolis but I noticed when I set the
timezone to America/New_York or UTC that this problem doesn't happen

$ TZ=America/Indianapolis date -d "now - 9001 days"
date: invalid date ‘now - 9001 days’
$ TZ=America/New_York date -d "now - 9001 days"
Thu 05 Sep 1996 07:05:55 PM EDT
$ TZ=UTC date -d "now - 9001 days"
Thu 05 Sep 1996 11:05:59 PM UTC
$ TZ=America/Metlakatla date -d "now - 9001 days"
date: invalid date ‘now - 9001 days’
$ 

I found that last one after trying a for loop in /usr/share/zoneinfo/America

So I'm not sure if this is a problem with coreutils or a change in the
zoneinfo database. Any ideas?

Mark

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