From: Axel Etzold <AEtzold@...>
Date: 2008-08-23T03:52:04+09:00
Subject: Re: DateTime in UTC


-------- Original-Nachricht --------
> Datum: Sat, 23 Aug 2008 03:31:10 +0900
> Von: "bcparanj@gmail.com" <bcparanj@gmail.com>
> An: ruby-talk@ruby-lang.org
> Betreff: Re: DateTime in UTC

> 
> > I created the following list of the expected behavior
> fromhttp://www.google.com/googlecalendar/event_publisher_guide.html
> >
> > Hour : Value in UTC
> > 1 �: 0900
> > 2 �: 1000
> > 3 �: 1100
> > 4 �: 1200
> > 5 �: 1300
> > 6 �: 1400
> > 7 �: 1500
> > 8 �: 1600
> > 9 �: 1700
> > 10 : 1800
> > 11 : 1900
> > 12 : 2000
> > 13 : 2100
> > 14 : 2200
> > 15 : 2300
> > 16 : 0000
> > 17 : 0100
> > 18 : 0200
> > 19 : 0300
> > 20 : 0400
> > 21 : 0500
> > 22 : 0600
> > 23 : 0700
> > 00 : 0800
> >
> > Hour:Mins - UTC value
> > 00:00 - 0800
> > 00:15 - 0815
> > 00:30 - 0830
> > 00:45 - 0845
> >
> > It seems to be using some offset to convert the given date to UTC
> > values. I don't know how to convert a given hour to its UTC value.
> 
> Sorry, I meant converting from Date or DateTime object to UTC values
> similar to above sample data for hours and mins. Thanks.

One of the two times is your local time zone (if it's +08:00, you'll most probably be in China, Malaysia, Singapore,
the Philippines, somepart of central Indonesia  or in Western Australia.)
There is a database collecting time zone details, including daylight savings time, by Mr. Olson,
and there's a Ruby library to convert from and into UTC ,which is basically the time zone of
England, disregarding daylight savings time there.

Look here :


http://tzinfo.rubyforge.org/
http://www.worldtimezone.com/index24.html  (the map has nice zoom-in properties)

Best regards,

Axel

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