Question

answer in brief : how is the standard time of a place determined ?

Answer 1

Earlier the solar time was taken into consideration to come up with the actual time unit.

Then the standard time was set by the government as per the areas of longitudes.

Nowadays, people are dependent on the time zone map to determine the actual answer of the time schedule.

The longitude method is still used by the mobile phone to set the time in the clock as per the UTC line and the IST time.

Answer 2

Finding the standard time of a place by the longitude of the place is an old dated method.

When countries were separated by time zones in the 19th century, the longitude method was withdrawn.

Using time zone database is the best way to calculate the standard time in a place.

Time zone map can also be used to predict the timing.