The Full form of IST is Indian Standard Time. It is the time observed throughout India and Sri lanka with a time offset of UTC +5:30. India does not observe daylight saving time (DST) or other seasonal adjustments. In military and aviation time IST is designated E* (“Echo-Star”). Indian Standard Time (IST) is calculated on the basis of 82.5′ E longitude, in Mirzapur, Uttar Pradesh, which is nearly on the corresponding longitude reference line.
History of IST
Our central government had established Indian Standard Time or as we call it Indian Standard Time after independence in 1947 AD. The ISD was established by the central government as the official time for the entire country. Most importantly, Kolkata and Mumbai were retained in what is known as their local time until 1948 and 1955 AD. The central observatory was moved from Chennai to one of the locations in Shergarh Fort in Prayagraj district so that the observatory could reach here around 05:30 UTC. It was given an abridged form using daylight saving time during the India-Pakistan wars in 1993 and 1971 and the China-India wars in 1993.
Telephone Katha Mobile companies also have the certificate relayed by Standard Time. In today's time, GPS is the best way to know the time, with the help of which it is becoming increasingly popular among the youth to get the time. The full form of GPS is Global Positioning System. The standard time of Nepal is UTC 05:45, the standard time of Newfoundland is UTC – 03:30, the standard time of Myanmar is UTC 06:30 and the standard time of India is UTC 05:30. The Republic of India applies only one time in a year to the whole of India, which is why it uses Indian Standard Time. Indian Standard Time moves approximately 5:30 hours ahead of Universal Time and for this reason it is also written as UTC 05:30. India currently does not observe DST or Any Time Time. Signals are detected only by human laboratories.
When did India time start?
As soon as India became independent from the British in 1947, the union government established the IST and since then the same time standard has been going on. But even at that time two big cities of the country Kolkata and Mumbai were not included in it or joined in 1948 and 1955. It is a very good thing for us that we have our own time zone and we are going on a meeting or call with a person from a different country. So you can tell him brother, you should fix the meeting according to the Indian time zone so that you do not have to wait for it at night.