Time Zone Converter
Convert a time between zones, with daylight-saving edges flagged.
Zone data comes from your own browser. Nothing is looked up over the network.
Scheduling across time zones is a problem of politics rather than arithmetic. Offsets are set by governments, they change, some are not whole hours, and twice a year in many countries an hour either vanishes or happens twice.
More about Time Zone Converter
This converter takes a wall-clock reading in one zone and gives you the same instant in another, using your browser’s own time zone data so the offset it applies is the one in force on that date rather than the one in force today. A meeting in January and a meeting in July are not the same conversion, and a tool that uses the current offset for both is wrong for half the year.
The two awkward cases are named rather than guessed at. When the clocks jump forward, the hour they skip never existed: asking for 01:30 on the morning of a spring transition is asking for a time that was never on any clock, and the tool says so instead of quietly moving you an hour. When the clocks go back, an hour happens twice, and the tool shows the earlier instant while naming the later one, because silently picking is how an appointment ends up sixty minutes out.
Offsets that are not whole hours are handled properly too. India is UTC+5:30 and Nepal is UTC+5:45, and code that assumes whole-hour offsets gets both of them wrong. Both are in the list, along with the South-East Asian zones this site’s readers most often need.
- Uses the offset in force on the date you chose, not the one in force today
- Flags a wall clock that a spring-forward jump skipped over
- Flags an hour that happened twice, and names both instants
- Handles half-hour and quarter-hour offsets such as India and Nepal
- Your own zone detected and preselected, and always overridable
- A curated list of the zones people actually convert between
How to use it
- 1Set the date and time as it reads on the clock where it is happening.
- 2Choose the zone that clock is in; yours is filled in already.
- 3Choose the zone you want the answer in.
- 4Read the converted time, with its offset from UTC underneath.
Questions
Does this handle daylight saving time?
Yes, and it uses the offset for the date you entered rather than today. A January meeting and a July meeting convert differently.
What happens if I enter a time that was skipped?
The tool says so and shows the nearest real moment. On a spring-forward morning the skipped hour was never on any clock.
What about an hour that happens twice?
It shows the earlier of the two instants and names the later one, rather than picking one silently and leaving you an hour out.
Why is my city not listed?
The list is curated rather than the full IANA database of around six hundred zones. Any city in the same zone converts identically, so pick the nearest one listed.
Are half-hour time zones supported?
Yes. India at UTC+5:30 and Nepal at UTC+5:45 are both in the list and both convert correctly.