GMT is often used interchangeably with UTC, but technically GMT refers to the mean solar time at the Royal Observatory in Greenwich, London, while UTC is a more precise standard used globally.

No, the zone does not observe daylight saving time. However, the United Kingdom switches to BST (British Summer Time) in the summer.

London, Accra, and Lisbon follow GMT during the winter months, before switching to daylight saving schedules in the summer.

West African countries, including Ghana and Côte d'Ivoire, follow the same schedule as GMT year-round.

GMT and UTC are effectively the same in terms of hours, but GMT is based on astronomical observations, while UTC is based on atomic time.

The zone does not observe daylight saving time because the schedule is based on astronomical principles, and many regions that use GMT do not need to adjust for seasonal changes.

GMT was established in the 19th century as the standard for coordinating time worldwide, based on the position of the sun at the Royal Observatory in Greenwich.

In places using GMT, typical work hours are 9:00 AM to 5:00 PM, aligning with the standard business schedule in many countries.

Greenwich, in the United Kingdom, is significant as the location of the Royal Observatory, the Prime Meridian, and a hub for maritime navigation and global timekeeping.