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Why Is the UK One Hour Ahead of GMT During British Summer Time?

Discover why the UK moves one hour ahead of GMT during British Summer Time to maximize daylight in summer evenings.

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Video transcript

The UK is one hour ahead of GMT during British Summer Time (BST), which typically runs from the last Sunday in March to the last Sunday in October. This is done to make better use of daylight during the longer days of summer, providing more daylight in the evening. When not observing BST, the UK reverts to Greenwich Mean Time (GMT).

Questions and answers

  1. What is British Summer Time (BST)?

    British Summer Time (BST) is the practice of moving the UK clock one hour ahead of Greenwich Mean Time (GMT) during the summer months to extend evening daylight.

  2. When does the UK switch to and from BST?

    The UK typically starts British Summer Time on the last Sunday in March and ends it on the last Sunday in October each year.

  3. Why does the UK observe British Summer Time?

    The UK observes BST to make better use of natural daylight in the evenings during the longer days of summer, which helps save energy and provides more daylight for activities.

  4. Is UK time always one hour ahead of GMT?

    No, the UK is only one hour ahead of GMT during British Summer Time. The rest of the year, it observes GMT.

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