[tz] changes to the TZ database over versions

[Derick Rethans]

On Sun, 1 Jun 2014, Joris Van den Bogaert wrote:

> Hi Angel,
> > Matching geo data to a timezone is a bit fuzzy. On the 
> > other hand, you state that correct calculation is critical.
> 
> We’re working with old protocols that don’t include TZ information in the data that is sent to us, so we have to get thet TZ info through geo mapping tables.
> We’ve been looking at geopostcodes.com.  

If you have lat/lon, have a look at what I did here: 
http://derickrethans.nl/what-time-is-it.html

There is also a (free) dataset at 
http://download.geonames.org/export/dump/ linking nearly every city in 
the world with a TZiD -- in case you need to cover more than just the 
US.

cheers,
Derick