Re: Daylight savings time timezone conversion automatically?

Great! That does the trick.
I never knew about the "clone" method and "is_dst" on itself is not available
as method inside DateTime::TimeZone
but together it's excactly what i need.

thanks very much.

Ewald...

On Wed, Mar 26, 2008 at 01:01:03PM -0700, Tatsuhiko Miyagawa wrote:
> On Wed, Mar 26, 2008 at 11:34 AM, Ewald Beekman <[email protected]> wrote:
> > Is there a way to see if DST is in effect on a
> >  returned time zone object ?
> >  For instance, i have got a loop like this:
> >
> >  my @list = DateTime::TimeZone->all_names;
> >  foreach $zone (@list) {
> >         next unless ($zone =~ /\//);                    # skip timezone links in the list
> >         $dt = DateTime->now();                          # current computer time
> >         $tz = DateTime::TimeZone->new( name => $zone ); # timezone
> >
> >         $offset = $tz->offset_for_datetime($dt);        # offset from UTC for this timezone
> >         $TZ = $tz->short_name_for_datetime($dt);        # timezone name (e.g. CET)
> >         $dt->add(seconds =>  $offset);                  # convert computer time to time in timezone
> >         $hoffset = $offset / 3600;                      # offset in hours
> >
> >         printf "%40s\t%s\tGMT diff = %g\t%4s\t",$zone,$TZ, $hoffset,$DST;
> >         printf "%d/%02d/%02d %02d:%02d\n",$dt->year,$dt->month,$dt->day,$dt->hour,$dt->minute;
> >         }
> >
> >  How can i see for each zone displayed if it is in DST?
> 
> is_dst() method does it for you.
> 
>   if ($dt->clone->set_time_zone($tz)->is_dst) {
>        # it's in DST now
>   }
> 
> HTH

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