GMT to EDT

Greenwich Mean Time (GMT) is a time zone that is often used as a standard time reference for the world. It is based on the line of longitude that passes through the Royal Observatory in Greenwich, London, UK, which is at 0 degrees longitude.

Eastern Daylight Time (EDT) is a time zone that is four hours behind Coordinated Universal Time (UTC-4). During daylight saving time, some areas in the ET time zone switch to Eastern Daylight Time (EDT), which is used during the summer months.