When Does Daylight Savings Start 2024 Uk. This marks a return to greenwich mean time (gmt). Daylight savings time (dst), otherwise known as british summer time (bst), is when the clocks move forward an hour in spring before moving back an hour for autumn.
On the shortest day, saturday december 21, this. The period when the clocks are 1 hour ahead is called british summer time (bst).