Question

what is meant by indian standard time? why do we need it?

Answer 1

Indian Standard Time (IST) is the time observed throughout India, with a time offset of UTC+05:30. India does not observe daylight saving time (DSTu) or other seasonal adjustments.Therefore, the standard time for each country is usually taken as the time of the central meridian that passes through it. ... Thus, we need a standard meridian for the country. In India 82 ½ °E longitude determines the standard time. This is known as the Indian Standard Time.

Answer 2

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