Time Zone Converter
See one moment in several cities at once, and find a meeting time.
About this time zone converter
Converting between two time zones is easy to get wrong, because the offset is not fixed: daylight saving shifts it twice a year, and the two places rarely switch on the same date. There is a fortnight every spring and autumn where the usual difference is simply not the usual difference.
This uses your browser's own time zone database, so the offsets are correct for the specific date you pick, including the awkward weeks.
How to use it
- Pick a date and time, and the zone it is in.
- Add the cities you care about.
- Read the converted time for each, with the offset and the day shown.
- The working-hours bar shows where the overlap is if you are arranging a call.
Time Zone Converter — FAQ
Does it handle daylight saving?
Yes. Offsets are calculated for the exact date you choose, using your browser's IANA time zone data, so spring and autumn transitions are handled correctly.
Why is the difference not what I expected?
Almost always daylight saving. The UK and the US, for example, change clocks on different weekends, so for a couple of weeks each year the gap between London and New York is four hours rather than five.
What does UTC mean?
Coordinated Universal Time — the reference all other zones are offset from. It does not observe daylight saving, which is why servers and logs use it.