Indian Standard Time (IST) is the time observed throughout India, with a time offset of UTC+5:30. India does not observe daylight saving time, (DST) or other seasonal adjustments, although DST was used briefly during the Sino–Indian War of 1962 and the Indo–Pakistani Wars of 1965 and 1971.

Time signals

Equation of time
Hindu astrology
International Atomic Time
Terrestrial Time
Time zone (list)
zoneinfo