1. Local Time: Local time is the time reckoned by the noon sun at a given place. At any place a watch can he adjusted to read 12 O’ clock when the sun is at the highest point in the sky or when it is mid day. The time shown by such a watch will give the local time for that place. All the places, on a given meridian of longitude, have the same local time.
2. Indian Standard Time: In a particular country, local time of a particular or rather a central place is adopted as the uniform time for the whole country. It is called the standard time of that country or that area. In India, the local time of 8214 ° E Longitude is used as the standard time for the whole country. It is called the Indian Standard Time. 8214° E is thus the standard meridian of India.