Question

Why is the time of 0 degree longitude assumed as the Greenwich Mean Time?​

Answer 1

Answer:

We should always have a start for a finish. So the greenwich mean time is assumed as the start point.

Answer 2

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This runs from the North Pole to the South Pole, passing through the Old Royal Observatory in the London suburb of Greenwich.

This line has been called the Greenwich Meridian since 1884, and it is from here that all terrestrial longitudes are measured and the world's time zones are calculated.

Generally, if you are in a country east of the Greenwich Meridian, your local time is ahead of GMT (e.g. local time in China is GMT +8 hours).

West of the Greenwich Meridian, local time is behind GMT (e.g. local time in New York is GMT -5 hours in winter and GMT -4 hours in summer).

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