Indian Standard Time is calculated from the clock tower in Mirzapur nearly exactly on the reference longitude of IST at 82°30'E, within four angular minutes. In 1905, the meridian passing east of Allahabad was declared as a standard time zone for British India and was declared as IST in 1947 for the Dominion of India.

Indira Point is the southern tip of the Indian Ocean island of Great Nicobar, in the Nicobar Islands south of Burma. It represents the southernmost point of Indian national territory, some 1100 miles ESE of India’s mainland and only about 100 miles NE of Sumatra in Indonesia.

1. The Meghalaya Plateau is sub-divided into the Garo Hills, Khasi Hills and Jaintia Hills, named after the tribal groups living in the region.

1. White-bellied Heron naturally inhabits the north-eastern region of India.

2. The bellied Heron is a bird which is mostly found in the low-altitude marshy areas of the Himalayas.

3. It is also called imperial heron in India.

4. In the year 2007, it was listed as 'Critically Endangered' in the Red List of the International Union for Conservation of Nature (IUCN).