How is the standard time of a place determined ?
Answers
The standard time of a place is usually determined by the government of that place concerned.
They decide it based on historical precedent and then they declare their time zone and how it differs from the UTC.
Earlier Longitudes of the place was used to calculate the time zone but it has been obsolete since the 19th century.
Greenwich Mean Time: The Greenwich Mean Time acts as the standard time for all the time zones in the world. It has a time difference of 0 and is located in Greenwich, England.
It is based on the distance of the Prime meridain.
The Prime meridian is an imaginary line.
For example,
Consider India and Brazil,
Time: 6 am in India and 9:30 in Brazil.
Time Difference:
India is 5 hours 30 minutes ahead of GMT.
Brazil is 3 hours behind GMT.
Brazil is 8 hours and 30 minutes behind Indian Standard Time.
So, IF 6 am in India then its 9:30 pm in Brazil.
This is how the standard time of a place is determined.
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