Standard Meridian of India
Hence, it is necessary to adopt the local time of some central meridian of a country as the standard time for the country. The longitude of 82½° E (82° 30’E) is considered as the standard meridian. The local time Standard Meridian of India stated or mentioned at this meridian is considered as the standard time for the whole country. This is called as the Indian Standard Time (IST).
The Tropic of Cancer (23° 30'N) divides the country into almost two equal parts. To the southeast and southwest of the mainland, lie the Andaman and Nicobar islands and the Lakshadweep islands in Bay of Bengal and Arabian Sea respectively. Find out the extent of these groups of islands from your atlas.
India is one of the ancient civilisations in the world. It has achieved multi-faceted socioeconomic progress during the last five decades. It has moved forward displaying remarkable progress in the field of agriculture, industry, technology and overall economic development. India has also contributed significantly to the making of world history.
Indian Standard time (IST) is the time zone observed throughout India, with a time offset of UTC+05:30. India does not observe daylight saving time or other seasonal adjustments. In military Standard Meridian of India and aviation time IST is designated E* ("Echo-Star").[1] It is indicated as Asia/Kolkata in the IANA time zone database.