Time Zones
Convert any time. See the world's clocks and zones.
This map draws 40 distinct standard-time offsets across 120 zone polygons, far more than the 24 most people expect. 13 of those offsets are not a whole number of hours: India runs on UTC+05:30, Nepal on UTC+05:45, and the Chatham Islands on UTC+12:45. The full span runs from UTC-12:00 to UTC+14:00, which is 26 hours end to end rather than 24, because a few territories deliberately sit beyond the natural range to keep the same calendar date as the country they belong to. Offsets are a political choice, not a geographic one.
Time zone rules: IANA Time Zone Database, via your browser's Intl API. Zone boundaries: Natural Earth (public domain), simplified.
About this visualization
About this data
Every offset is computed live from the IANA time zone database that ships with your browser, so daylight-saving switches and date rollovers are always correct; no offset tables are maintained by hand.
The map shows Natural Earth's generalized standard-time zones: a stylized overview, not legal boundaries, and the polygons do not shift with daylight saving. The precise numbers (tooltip times, the converter, the clocks) always come from the IANA rules, never from the shapes.
Common questions
- How many time zones are there in the world?
- Many more than the 24 most people expect. This map draws 40 distinct standard-time offsets across 120 zone polygons, spanning UTC-12:00 to UTC+14:00. Note that this is a count of the offsets drawn on a generalized Natural Earth layer, which includes a few that no country currently observes, so treat it as the range the map covers rather than a count of offsets in active use. 13 are not whole hours: India is UTC+05:30, Nepal is UTC+05:45, the Chatham Islands are UTC+12:45.
- Does the converter handle daylight saving time?
- Yes. Conversions use your browser's own time zone database, so daylight saving transitions and date rollovers are handled correctly, including for the southern hemisphere where the shift runs the opposite way to Europe and North America.
- Why do some time zones use half hours?
- Because a time zone is a political choice rather than a geographic one. Countries pick offsets that suit their territory and their neighbors, and several settled on 30- or 45-minute offsets to sit between the standard hours.