Bug in GNU date ??

[MUTTON, PETER]

Hi,

I'm not sure if this a bug or correct behaviour.....

I'm using GNU date to convert timestamps between timezones and it
doesn't correctly handle Daylight Savings time.  E.g.

    #>  /usr/local/bin/date
    Mon Apr  5 16:42:28 EDT 2004

    #> /usr/local/bin/date -u -d "Mon Apr  5 16:42:28 EDT 2004"
    Mon Apr  5 20:42:28 UTC 2004

               ^^ correct as we are now Daylight Saving, 4 hrs
                  behind GMT

    #> /usr/local/bin/date -u -d "Sat Apr  3 16:42:28 EDT 2004"
    Sat Apr  3 20:42:28 UTC 2004

               ^^ should be 21 as we moved to Daylight Saving time
                  on Apr 4

    #> zdump -v /usr/share/lib/zoneinfo/Canada/Eastern |grep 2004
    /usr/share/lib/zoneinfo/Canada/Eastern  Mon Apr  5 20:54:27 2004
      UTC = Mon Apr  5 16:54:27 2004 EDT isdst=1
    /usr/share/lib/zoneinfo/Canada/Eastern  Sun Apr  4 06:59:59 2004
      UTC = Sun Apr  4 01:59:59 2004 EST isdst=0
    /usr/share/lib/zoneinfo/Canada/Eastern  Sun Apr  4 07:00:00 2004
      UTC = Sun Apr  4 03:00:00 2004 EDT isdst=1
    /usr/share/lib/zoneinfo/Canada/Eastern  Sun Oct 31 05:59:59 2004
      UTC = Sun Oct 31 01:59:59 2004 EDT isdst=1
    /usr/share/lib/zoneinfo/Canada/Eastern  Sun Oct 31 06:00:00 2004
      UTC = Sun Oct 31 01:00:00 2004 EST isdst=0

Peter Mutton