The Alerts are determined by atomic clocks and synchronised Using the worldwide technique of clocks that aid Coordinated Universal Time. India's time zone is based about the eighty two.five°E meridian, which passes by Mirzapur. The half-hour offset was picked to maintain the time close to the imply solar time across https://india-standard-time05012.cosmicwiki.com/2456490/the_definitive_guide_to_ist_time_now