Question

explane what is greenwich mean time

Answer 1

Greenwich Mean Time or GMT is World Time and the basis of every world time zone, which sets the time of day and is at the centre of the time zone map. GMT sets current time or official time around the globe. Most time changes are measured by GMT.

Answer 2

Answer:

Explanation:

Greenwich Mean Time is the yearly average (or 'mean') of the time each day when the Sun crosses the Prime Meridian at the Royal Observatory Greenwich. Essentially, mean time is clock time rather than solar (astronomical) time.