Hi cyg, this issue emerged from one of the typical questions on the bug-coreut...@gnu.org mailing list about why "date -d '1991-04-14 +1 day' fails" http://lists.gnu.org/archive/html/bug-coreutils/2010-08/msg00077.html The discussion around date calculation with such a daylight savings time issues (gap at 00:00 in the user's timezone) became esoteric, but there was a difference detected between upstream and cygwin of the coreutils-8.5 package.
The day 1993-08-20 doesn't exist in TZ=Pacific/Kwajalein (because at midnight Kwajalein moved the clocks ahead by 24 hours.), so coreutils 8.5 issues the following error on native Linux (according to Paul Eggert): $ TZ=Pacific/Kwajalein date -d 1993-08-20 date: invalid date `1993-08-20' but it doesn't fail on my Cygwin installation (see below). Is there a porting/packaging issue? Have a nice day, Berny -----Original Message----- From: Paul Eggert [mailto:egg...@cs.ucla.edu] Sent: Dienstag, 24. August 2010 10:04 To: Voelker, Bernhard Cc: Alan Curry; 6...@debbugs.gnu.org; 李嘉鹏 Subject: Re: bug#6897: date -d '1991-04-14 +1 day' fails On 08/24/10 00:23, Voelker, Bernhard wrote: > BTW: This example looks different here: > > $ TZ=Pacific/Kwajalein date -d 1993-08-20 > Sat Aug 21 00:00:00 MHT 1993 > > $ date --version > date (GNU coreutils) 8.5 > Packaged by Cygwin (8.5-2) > ... > > Why? Haven't a clue. Perhaps you can debug it? I get the correct answer (i.e., there was no such date) on both RHEL 5 with my own-built coreutils 8.5, and with Ubuntu 10.04 with its standard-issue coreutils 7.4.
