Time Zone Synchronization

I have a server which runs on Java and client which runs on python. When I connect the client and server I have to sync the time from server to cl开发者_C百科ient. I was successful in connecting and sending streams from server to client. I wanted to know what is the usual way to send time and timezone. How can i do it? For now i am sending time in miliseconds and paring that in python to get the date and time. But I don't know how to send time zone.

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You should transmit and process the time in UTC and not mess with timezones at all. In Java, this is exactly what System.currentTimeMillis() returns.

Edit: The correct format to transfer timezone information is to use a continent/city ID as in the tz database, e.g. "America/New_York" or "Europe/Berlin". This is also used by Java. The base timezone offset is insufficient because it cannot accomodate daylight savings time and historical timezone changes.

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Do you know NTP, the Network Time Protocol?