The Signals are based on atomic clocks and synchronised While using the worldwide method of clocks that help Coordinated Universal Time. India's time zone is based to the 82.5°E meridian, which passes by Mirzapur. The fifty percent-hour offset was picked out to keep the time near the indicate solar time https://ist-time-now09872.sunderwiki.com/2420077/what_does_stopwatch_mean