GMT is a country based time standard. It is used primarily by bodies associated with the United Kingdom like the BBC World Service, the Royal Navy, and the Met Office. As a matter of fact, several countries adopt GMT in their legislation. They are the United Kingdom, Belgium, Republic of Ireland, and Canada.How do you calculate GMT time?
Greenwich Mean Time is calculated from the Prime Meridian, which runs north and south through Greenwich, England. It's also home of the Royal Observatory. Since the Earth is round, there needs to be a notational line where things begin and end, and the Prime Meridian is it for time. Your GMT is either plus or minus the time at the Prime Meridian.Is UTC and GMT the same thing?
UTC and GMT are almost the same. In fact, there is no practical difference which would be noticed by ordinary people. Some websites, for example Wikipedia, use UTC because it does not make any country look more important than the others. It offers one time for all the internet (the same time can be used by people all over the world).What cities are in GMT?
Principal Cities: The largest city in the GMT timezone is London from United Kingdom with population about 7.557 million people. Other major cities in the area are Abidjan, Dakar, Grand Dakar, Accra. Greenwich Mean Time (GMT) originally referred to the mean solar time at the Royal Observatory in Greenwich, London.