The Signals are based on atomic clocks and synchronised With all the worldwide method of clocks that aid Coordinated Common Time. India's time zone relies within the 82.5°E meridian, which passes by Mirzapur. The 50 percent-hour offset was decided on to help keep the time close to the suggest solar https://ist-world-clock32448.wikijm.com/2408950/current_ist_time_no_further_a_mystery