/bin/date handling of daylight savings

[Jean-Yves Provost]

Hi,

This is rather interesting:

Australia/Sydney timezone moved to daylight savings last sunday
----
address@hidden jyp]$ zdump -c 2002 -v Australia/Sydney |grep 2001
Australia/Sydney  Sat Mar 24 15:59:59 2001 UTC = Sun Mar 25 02:59:59 2001 EST 
isdst=1 gmtoff=39600
Australia/Sydney  Sat Mar 24 16:00:00 2001 UTC = Sun Mar 25 02:00:00 2001 EST 
isdst=0 gmtoff=36000
Australia/Sydney  Sat Oct 27 15:59:59 2001 UTC = Sun Oct 28 01:59:59 2001 EST 
isdst=0 gmtoff=36000
Australia/Sydney  Sat Oct 27 16:00:00 2001 UTC = Sun Oct 28 03:00:00 2001 EST 
isdst=1 gmtoff=39600
----

all /bin/date command using the -d "last xxxday" is 1 day out (1 hour 
actually 00:00 - 01:00 = 23:00 the previous day)

address@hidden jyp]$ date -d "last monday"
Sun Oct 21 23:00:00 EST 2001
address@hidden jyp]$ date -d "last tuesday"
Mon Oct 22 23:00:00 EST 2001
address@hidden jyp]$ date -d "last wednesday"
Tue Oct 23 23:00:00 EST 2001
address@hidden jyp]$ date -d "last sunday"
Sat Oct 27 23:00:00 EST 2001
address@hidden jyp]$ date -d "last saturday"
Fri Oct 26 23:00:00 EST 2001
--------
Calling to date into the future is fine

-----
address@hidden jyp]$ date -d "next sunday"
Sun Nov  4 00:00:00 EST 2001
address@hidden jyp]$
-----

I'm running Mandrake 8.0,  2.4.12 kernel

address@hidden jyp]$ rpm -qf /bin/date   
sh-utils-2.0-13mdk

address@hidden jyp]$date --version
date (GNU sh-utils) 2.0
Written by David MacKenzie.

Copyright (C) 1999 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

I'm happy to provide further details if required

Jean-Yves Provost