[sf-perl] Timezone question

Earl Ruby earl at ruby.org
Tue Aug 21 10:58:36 PDT 2012

I'd looked at Time::Timezone, Time::Zone, Time::ZoneInfo, and some
other packages under Time::, but not DateTime::TimeZone. Thanks, I'll
check it out.

On Mon, Aug 20, 2012 at 5:56 PM, Joseph Brenner <doom at kzsu.stanford.edu> wrote:
> Earl Ruby <earl at ruby.org> wrote:
>> Does anyone know of a CPAN function that, when passed the name of a
>> timezone from zoneinfo (e.g. "America/Los_Angeles") and whether or not
>> daylight savings time is in effect will return the UTC offset in
>> seconds?
>> I've looked through CPAN and several modules look like they do this
>> but don't. Either they don't work with the zones from zoneinfo or they
>> won't give the offsets for standard and daylight time (only "current"
>> time).
> Have you looked at DateTime::TimeZone?
>   http://search.cpan.org/~drolsky/DateTime-TimeZone-1.48/lib/DateTime/TimeZone.pm
> You can use it like this to get the offset:
>   use DateTime;
>   use DateTime::TimeZone;
>   my $tz = DateTime::TimeZone->new( name => 'America/Chicago' );
>   my $dt = DateTime->now();
>   my $offset = $tz->offset_for_datetime($dt);
> And I would guess you could use "is_dst_for_datetime" to
> determine if you're in daylight savings time.

Earl Ruby

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