What Is the Difference Between GMT and BST? Understanding UK Time Zones

Learn the key differences between GMT (Greenwich Mean Time) and BST (British Summer Time) and how daylight saving affects UK time.

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GMT (Greenwich Mean Time) is the time zone at the Prime Meridian in Greenwich, London. BST (British Summer Time) is GMT+1, used in the UK during daylight saving time to make better use of daylight. So, when BST is in effect, the UK is one hour ahead of GMT.

FAQs & Answers

  1. What is GMT? GMT, or Greenwich Mean Time, is the time zone at the Prime Meridian in Greenwich, London, and serves as a global reference time.
  2. What is BST and when is it used? BST, British Summer Time, is GMT+1 used in the UK during daylight saving months to extend evening daylight.
  3. Why does the UK switch between GMT and BST? The UK switches between GMT and BST to make better use of daylight during summer, shifting clocks forward by one hour.
  4. How does BST affect time compared to GMT? During BST, the UK is one hour ahead of GMT, effectively GMT plus one hour.

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