# Keyword Analysis & Research: time zones world clock

## Keyword Research: People who searched time zones world clock also searched

How many different time zones are around the world?

As it is night in some parts of the world while it is day in other parts, different places in the world have different times. This is why the world is divided into 24 different time zones. One for each hour in a day. Very large countries that are spread out across many time zones, such as Russia or the USA, are divided into separate time zones.

How are time zones calculated around the world?

Geometrical division of time across the world in 24 longitudinal divisions. Time zones are determined by dividing the Earth into 24 lunes with 15 degrees of longitude in width, observing local time, and then making the zone one hour earlier than the zone immediately to the east. Use 'time zone' in a Sentence.

Where do the world time zones begin?

What you may know as the prime meridian -- or more formally the Greenwich Meridian -- is the initial division line for all time zones. It's where dividing the Earth up into regions effectively starts. The prime meridian is an imaginary line -- invisible by all rights -- that runs from north to south along the 0 degree longitude line of Earth.