Time Zone Converter

In short A time zone is not an offset, and that difference is where almost every conversion goes wrong. "UTC+1" is a number; "Europe/Paris" is a rule that produces +1 in winter and +2 in summer. A converter that works on fixed offsets is right for about ten months a year and quietly wrong for the other two, and the weeks it is wrong are exactly the weeks people are rescheduling around a clock change. This page uses named IANA zones and asks your own browser for the offset that actually applied at that instant. Two cases deserve naming because nearly every tool resolves them silently. On the spring transition an hour is skipped: if the clocks jump from 01:00 to 02:00, then 01:30 never happened, and asking to convert it is asking about a time that does not exist. On the autumn transition an hour repeats: 01:30 occurs twice, an hour apart, and those are two different instants. Both are reported here rather than guessed at. One more thing worth knowing: most of the world does not do this at all. Of the several hundred zones a browser knows, roughly seven in ten never change their clocks — daylight saving feels universal mainly to people in Europe and North America.