The Earth is divided into 24 time zones. Each one has a central longitude line 15º from time zone before it. The map below shows all the time zones.
Using the colors, you can see which time zone you’re in. At the top of the map, you can note the central longitude for your time zone.
Below are the time zones longitudes for the United States:
- Atlantic time zone: 60º
- Eastern time zone: 75º
- Central time zone: 90º
- Mountain time zone: 105º
- Pacific time zone: 120º
- Alaskan time zone: 135º