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.When does evening start est?
Though the term is subjective, evening is typically understood to begin just before twilight, sunset, during the close of the standard business day, 5 pm – and extend until night – typically astronomical sunset, 9 pm.Where is GMT located?
GMT is based on the line of longitude running through the Greenwich Observatory located in the suburbs of London. GMT, as the "mean" within its name, would indicate, represented the time zone of a hypothetically average day at Greenwich.