From: "bcparanj@..." <bcparanj@...>
Date: 2008-08-23T07:56:11+09:00
Subject: Re: DateTime in UTC

On Aug 22, 3:04 pm, Rick DeNatale <rick.denat...@gmail.com> wrote:
> [Note:  parts of this message were removed to make it a legal post.]
>
>
>
> On Fri, Aug 22, 2008 at 2:52 PM, Axel Etzold <AEtz...@gmx.de> wrote:
>
> > -------- Original-Nachricht --------
> > > Datum: Sat, 23 Aug 2008 03:31:10 +0900
> > > Von: "bcpar...@gmail.com" <bcpar...@gmail.com>
> > > An: ruby-t...@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,
>
> And for most timezones, the utc offset depends also on the full time, since
> it is different during the period, if any, for which daylight saving time is
> observed for the particular timezone.
>
> The TZinfo gem can be used to handle this, once you dig in and understand
> it.
>
> --
> Rick DeNatale
>
> My blog on Rubyhttp://talklikeaduck.denhaven2.com/

Actually, this is for a Rails project. Will the Rails 2.1 help in this
case?