Re: Timezone conversion in Perl

re both Q1 and Q2:check Re^2: simple locale-dependent output functions? and/or Date::Manip

From perldoc Date::Manip (~30 lines into the synopsis):

$date = Date_ConvTZ($date);
$date = Date_ConvTZ($date,$from);
$date = Date_ConvTZ($date,"",$to);
$date = Date_ConvTZ($date,$from,$to);
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ie, Date::Manip does TZ conversions; I admit I have not experimented with your attempt to distinguish between CSTs

Question 2: not even a half-baked idea... except to observe that knowing the location using CST provides at least the basis for an inference.

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Re^2: Timezone conversion in Perl by rlucas (Scribe) on Dec 27, 2007 at 06:30 UTC
I think Date::Manip is considered the slow (speedwise, not mental-capacity wise) cousin of DateTime. Either should be able to handle the fairly trivial case of timezone conversion. (What's not trivial is YOU remembering to use the same standard way of referring to time everywhere! Once you do that, adding some minutes is the easy part.) I am also fairly certain that any mainstream module is going to rely upon the system time's GMT offset (e.g. -0500) rather than trying to disambiguate abbreviations, so no worries there.	[reply]
Re^3: Timezone conversion in Perl by dsheroh (Monsignor) on Dec 27, 2007 at 17:10 UTC
Not just "considered", the Date::Manip documentation has an entire "should I use Date::Manip" section in which the modules author explains at great length that Date::Manip is by far the most flexible date/time module out there, but also the slowest (in large part because of that extreme flexibility).	[reply]
Re^4: Timezone conversion in Perl by autarch (Hermit) on Dec 28, 2007 at 04:48 UTC
Well, that section more or less predates the DateTime project, to the best of my knowledge. Date::Manip is quite slow, but the DateTime project has never made speed anywhere near as high a priority as correctness, completeness, and having a sane API. The original poster didn't make it entirely clear what he wants to do, but the Perl Advent calendar article mentioned in another post is a decent pointer for using DateTime is a good start.	[reply]