Every October, there's a week when Europe and the U.S. are out of sync with daylight saving time, potentially confusing people organizing international meetings.

The clocks will go back one hour at 2am on the last Sunday of October, putting the UK on Greenwich Mean Time (GMT).

The Government's website states: "In the UK the clocks go forward 1 hour at 1am on the last Sunday in March, and back 1 hour at 2am on the last Sunday in October. The period when the clocks are 1 hour ahead is called British Summer Time (BST).