The Alerts are according to atomic clocks and synchronised Together with the worldwide process of clocks that aid Coordinated Common Time. India's time zone is predicated over the 82.5°E meridian, which passes via Mirzapur. The fifty percent-hour offset was chosen to keep the time near to the suggest solar time https://rivernuqwg.celticwiki.com/2425790/5_simple_techniques_for_ist_time