As far as I know there is no Qt-specific way to get the time zone. There is, however, a lot of support for dealing with dates/times, independent of time zones.

So, do you ask because you need a specific task involving dates or times done, or do you really just need to know what the current time zone is? In the first case, Qt might offer what you need. In the second case, I'm afraid that at least I don't know of a platform-independet way of determining that.