Date Countries Switch to/from DST

O'Neil, Bonnie bonnie.oneil at
Fri Feb 4 22:23:55 UTC 2011

Wow!! Thanks so very much!

Bonnie K. O'Neil
Enterprise Data Architect
Travelport Global Technology Solutions
Office: 303-397-5239
Mobile: 303-725-1737

-----Original Message-----
From: billseymour at [mailto:billseymour at] On Behalf Of Bill Seymour
Sent: Friday, February 04, 2011 2:29 PM
To: tz at
Subject: Re: Date Countries Switch to/from DST

On Fri, Feb 4, 2011 at 11:15 AM, O'Neil, Bonnie
<bonnie.oneil at> wrote:
> Hello list,
> I am also a Timezone newbie.
> I need to get a dump of the tz database for all countries in the world,
> which timezone they are in, and what date they switch on/off DST.  I'm not
> interested in getting real time dates; I just need a refresh of the database
> periodically.

You can download the tz database at .

Mostly for my own benefit, I wrote a little paper about how to read tz's
source files: .

Hope that helps,


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