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In C++ on Windows, given a city, lets say london or newyork or sydney or singapore etc.. how do I find the UTC offset for each of them, ie the function should be able to accept a city name and return the UTC offset in the current scenario ie taking into account daylight savings. Any ideas how this can be done using win32 APIs

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Sounds like you want an API for searching the zoneinfo / tz database..?

Don't know if there is a library with precisely the interface you want. But reading it and searching it yourself would not be difficult. It's just a flat file database, text with one record per line.

http://en.wikipedia.org/wiki/Zone.tab

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More specifically, can I get the timezeone the city is currently observing given the city name in windows?

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