From: nobu.nokada@...
Date: 2003-01-14T14:08:46+09:00
Subject: Re: time & timezones

Hi,

At Sun, 12 Jan 2003 09:27:18 +0900,
Martin Pirker wrote:
> In internet data (mail/news/logs/...) one handles many time/date
> stamps from different timezones.
> ParseDate does an amazing job of parsing, but I don't know what
> to do with the result.
> In order to compare points in time one has to convert all the stamps
> to one time zone, e.g. convert them all to GMT/UTC,
> but... how do I do this in Ruby?

Time#gmtime

> Class Time doesn't provide a function to create a new one with
> the values from ParseDate (timezone!) - at least I wasn't successful
> with the 10 parameter form of .gm ?!?

require 'time'

puts Time.parse("Tue Jan 14 14:02:43 JST 2003").gmtime # => Tue Jan 14 05:02:43 UTC 2003
puts Time.parse("Tue Jan 14 14:02:43 PDT 2003").gmtime # => Tue Jan 14 21:02:43 UTC 2003

> Bonus question: Is there a function which outputs a Time object
> in RFC form (date -R on Linux prompt), as strftime with %Z gives a name,
> not easier (re)parseable numbers for timezone?

require 'time'

puts Time.now.rfc822

-- 
Nobu Nakada