GMT to BST

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.

BST (British Summer Time) is a time zone that is one hour ahead of Coordinated Universal Time (UTC+1). It is used in the United Kingdom during the summer months, from the last Sunday in March to the last Sunday in October.