Found the exact spot where the Indian Meridian Time Longitude is marked Prayagraj Varanasi Highway

Описание: India adopted Indian Standard Time (IST) as the official time of India. First the longitude of 82 degrees and 5 minutes was chosen which passed through a place called Naini near Prayagraj. Later it was shifted to 82 degrees and 30 minutes which brought it to the present place in Mirzapur district.

The Allahabad Observatory is given the responsibility to maintain the Indian Standard Time.

Since 1951 the Indian Govt has consistently resisted efforts to divide the country into more than one time zone.

The National Physical Laboratory at New Delhi is responsible to provide official time signals. It does that using the highly accurate atomic clocks. This time is synchronized by broadcasts by Doordarshan and All India Radio.