Answers

2016-04-13T20:56:30+05:30
Standard meridian solves the controversies of the particular country on matters pertaining to the time
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2016-04-13T21:01:08+05:30
The standard meridian is located at Greenwich, UK, which is thus considered to be 0° Longitude.

The Standard Time Zone of the World is calculated with respect to the the Standard Meridian. It is known as Coordinated Universal Time (UTC).

All the other time zones of the world are calculated with respect to UTC.
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