You are here
![[Class 6 Geography] Time Zones - Latitudes and Longitudes - Concepts](https://cdn.teachoo.com/014efa42-e239-43f5-aed8-076b2ff6c397/time-zones-of-the-world---teachoo.png)
- The time zones are regions of the earth that have the same standard time
- In 1884 , the International Prime Meridian Conference, agreed to divide the world into 24 time zones standard time zones.
- Each zone is a narrow belt running from north to south, with an west-east extent of 15 degrees of a longitude.
- The time zones are based on the Greenwich Mean Time (GMT) or Universal Time (UT) , which is the time at the Prime Meridian or 0° longitude
- The time zones are numbered from 1 to 24, starting from the Prime Meridian and going eastward and westward
- The time in each time zone is an exact number of hours ahead or behind GMT, except for a few countries that have a difference of half an hour
- The time zones are adjusted to match the political boundaries of the countries that fall within them
- Some countries with a large longitudinal extent have more than one time zone, such as Russia , which has 11 time zones
