The Signals are according to atomic clocks and synchronised Using the worldwide method of clocks that support Coordinated Universal Time. India's time zone is based over the 82.5°E meridian, which passes by means of Mirzapur. The 50 %-hour offset was picked to maintain the time near to the mean photo https://currentisttime48215.cosmicwiki.com/2462460/rumored_buzz_on_utc_offset