Understanding the Difference Between Greenwich Mean Time (GMT) and Indian Standard Time (IST)

Learn about the key differences between GMT and IST time zones, including their applications and adjustments.

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Greenwich Mean Time (GMT) is the mean solar time at the Royal Observatory in Greenwich, London. Indian Standard Time (IST) is 5 hours and 30 minutes ahead of GMT. While GMT is used during winter in the UK and does not change, IST is consistent throughout the year without any daylight saving adjustments.

FAQs & Answers

  1. How is Indian Standard Time calculated? Indian Standard Time is calculated by adding 5 hours and 30 minutes to Greenwich Mean Time.
  2. Does Indian Standard Time observe daylight saving time? No, Indian Standard Time does not observe daylight saving time and remains consistent throughout the year.
  3. Why is Greenwich Mean Time important? Greenwich Mean Time is important as a global time standard that helps synchronize timekeeping worldwide.
  4. What is the time difference between GMT and IST? The time difference between GMT and Indian Standard Time is 5 hours and 30 minutes, with IST being ahead.

Watch More

If you found this comparison of GMT and IST helpful, check out our video explaining time zones around the world and their historical significance.

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