Is there an XML, containing all big cities, their TimeZone offset to the UTC?

I'm searching for an XML, which contains all major cities in the world, their off开发者_高级运维set to the UTC, and also, start and end of daylight saving times.

Thanks for your help!

---

It is not possible to create what you're asking for. The UTC offset at a particular location depends on the current date and time, location, local laws, national laws and international laws. The last three can change at any time. This is why there's a whole timezone system, which must be updated regularly, to manage these calculation. Start by reading this Wikipedia article.

---

Take a look at the GeoNames.org API, maybe this helps you out?

---

Not XML, but probably the closest thing you can get for what you need: TZ database