The Signals are according to atomic clocks and synchronised with the worldwide procedure of clocks that aid Coordinated Common Time. India's time zone is based around the 82.five°E meridian, which passes via Mirzapur. The 50 percent-hour offset was picked to help keep the time near to the indicate solar time https://currenttimeinindia49701.eveowiki.com/2492303/the_5_second_trick_for_live_world_clock