About the Time Zone Map
How does the interactive Time Zone Map work – legend:
- Hover your mouse over the map to highlight a time zone. This feature doesn't work in older versions of Internet Explorer (IE8 and below).
- Hover your mouse over a city (red dot) to see the city and country name plus current local time. “DST” is displayed if the location is currently observing daylight saving time.
- Click on a city (red dot) to open the corresponding city page, which contains ample information about time zone, DST, weather, sun and moon times, dialing codes, coordinates, and airports of that location.
24 main time zones
The map is divided into 24 main time zones. Each time zone is defined by the current time difference – or offset – from Coordinated Universal Time (UTC), shown in whole hours at the bottom of the map. Example: +3 means that the time zone is 3 hours ahead of UTC. On land, time zones are represented by areas of different colors, in international waters by blue and white columns.
The time difference between each time zone is usually one hour, except in the diagonally striped areas, where it can be half hours or even quarter hours. For example, India is 5:30 hours ahead of UTC.
International date line
The map's version of the International Date Line, shown between Asia/the Pacific and the Americas, is not drawn to full accuracy.
Always current including DST changes
The Time Zone Map is dynamic as it shows areas that currently follow the same local time - and not static time zones, like many other available maps. This means that time zone boundaries shift every time a country switches between standard time and daylight saving time. Timeanddate.com closely monitor these switches and any changes in legislation and apply them to the Time Zone Map as well as publish stories in our Time Zone News (with RSS feed)
Why are the lines straight in the ocean but not on land?
The local time in international waters is defined by the longitude only. On land, however, political and geographic factors lead to distortions. That's why land areas that share the same longitude with sea areas may not be in the same time zone (for example UTC offset +11).
Do people at sea change their clocks according to the time zones?
The map shows a simplified version of the time zones at sea. Vessels and offshore platforms that operate within a country's exclusive economic zone or in the immediate vicinity of a landmass typically observe the current local time observed on land.
More about Time Zones
In This Article
- How does the interactive Time Zone Map work – legend:
- 24 main time zones
- What do the diagonal stripes mean?
- International date line
- Always current including DST changes
- Why are the lines straight in the ocean but not on land?
- Do people at sea change their clocks according to the time zones?
- More about Time Zones