By observing the Earth’s movements relative to the Sun. One complete spin of the Earth on its axis takes a day. Approximately 365.26 spin (days) make one complete revolution of the sun, or one solar year. Units of time smaller than a day, such as hours, minutes, and seconds, are measured using clocks. Weeks, months, and years, are measured using calendars. Time to know and find out more........
If everyone in the world set their clocks to the same time, when it was midnight it would be daylight in one part of the world and the middle of the night in another. To avoid this, Earth is divided into time zones.....
Time zones are generally follow lines of longitude (imaginary lines running from pole to pole), but usually bend to include entire countries or states in one time zone.
There are 24 time zones, each 150 of longitude and one hour apart.
India straddles more than one time zone but has chosen a time halfway between those on either side so that the whole country can use one time.
Russia has 11 time zones – more than any other country.
China stretches across four time zones but uses only one time.
The International Date Line dividing one day from the next follows the 1800 meridian (longitude line) on the globe.
Countries east of the date line are a day ahead of those to the west.
The International Date Line runs mostly through the ocean, but where it would pass through or near land it bends to avoid dividing a region into two days.
Record Breaker
1. First demonstrated in February 2008, the world’s most accurate clock uses strontium atoms and is accurate to one second in 200 million years.
2. The Colgate Clock in Jersey City, USA, has a diameter of 15.24m (50ft) and is the world’s largest clock.
3. The tallest clock tower in 239.9m (789ft) high and tops the NTT DoCoMo Yoyogi Building in Tokyo, Japan.
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