On Nov 14, 2013 3:33 AM, "dusan pecek" <dusan.pecek@gmail.com> wrote:
>
> Hi, not sure if this is the right place but I will ask anyhow.
> I am interested in calculation of local time from lat, lon and UTC (ZULU).
> It basically means that local time in the past can be calculated.
> Does your database enable to do that.

I for one think this list is a fine place to ask that question.

The links I've seen others post in reply cover the answer, but to summarize, the zoneinfo database is necessary but not sufficient.

It documents the rules for timezone changes, including but not limited to summer time AKA "daylight savings" for regions that share a common rule. The key for lookups in this database is often of the form continent/city, e.g. I'm in America/New_York. Most rules have many keys.

But a separate database (and separate code) is needed to learn what rule covers (or contains) a given location as might be specified by latitude and longitude.