<p>I was hoping someone could send me in the direction of a regularily updating time zone database.</p>

<p>I have found one, but apologies i cant remember where it was from, however with the current GMT clock change fast approaching, i fear all my data will be incorrect, ie the differences from UK to New Yrok will change from 5 hours behind to 6 hours behind.</p>

<p>Any help on this matter would be much appreciated.</p>

<p>Cameron</p>

Do you mean like the
Olson database
?
For instance, the
fleegix.js
javascript library is a timezone-enabled, drop-in replacement for the stock JavaScript Date, giving you full-blown timezone support, independent from the timezone set on the end-user's machine running the browser. It uses the Olson zoneinfo files for its timezone data.
I believe the
time-converter
uses also such a database, as well as
timeanddate.com
, e.g. for
London
or
New-York
.
Any DST information (Daylight Saving times) can be deduced from
timeanddate.com
, but also from
daylight-savings-time.info
Here is a
javascript program
that does exploit DST informations in order to apply the correct time shift.
And also another script for
SimpleTimeZone
.
You can also query DST data from
global-time-zones.com
, as in
wwp.britishsummertime.co.uk
. You have also informations in
webexhibits.org
See
this forum
for a lengthy discussion about how to retrieve DST informations.
Finally, see that
SO question
for a tar.gz Olson database example.