* The standard meridian of India is 82.5 degrees east of the Greenwich Meridian, i.e., 82°30' E. This meridian passes through Mirzapur in Uttar Pradesh. * It runs through the centre of the nation. In the year 1905, this longitude was opted as the meridian to create the Indian Standard Time. * The standard meridian is used for reckoning standard time all over the world: standard meridians are those meridians whose longitudes are exactly divisible by 15 Degree. * We need a standard meridian for India as there is a time lag of about 2 hours between Gujarat & Arunachal Pradesh. In order to avoid confusion of time in different states, India selected a standard meridian which is 82 degrees 30 East and it passes via Mirzapur in Uttar Pradesh. * 82°30' E has been adopted as the Standard Meridian of India as it is situated in the centre of all longitudes & latitudes in which our country is situated.