Previous Year Question

GMT stands for Greenwich Mean Time. It is associated with the historic Prime Meridian passing through the Royal Observatory at Greenwich, London. According to Royal Museums Greenwich, the word “Mean” in GMT refers to the average solar time determined with reference to the Sun crossing the Prime Meridian at Greenwich.

At the International Meridian Conference of 1884, the meridian passing through Greenwich was adopted as the 0° Prime Meridian for longitude and timekeeping. This provided a common global reference for measuring longitude and time.

An important examination distinction is that today UTC
(Coordinated Universal Time) is primarily used as the international time standard. Indian Standard Time is UTC+5:30. GMT and UTC have the same clock offset for ordinary civil use, although they are not scientifically identical concepts.