This page displays the exact, live Greenwich Mean Time (GMT). Once used as the international civil time standard, GMT is based on the solar time at the Prime Meridian (0° longitude) running through the Royal Observatory in Greenwich, London. The interactive clock above is synchronized to display highly accurate standard GMT in real time.
What is Greenwich Mean Time (GMT)?
Greenwich Mean Time (GMT) represents the mean solar time at the Royal Observatory in Greenwich, London. Historically, it was adopted globally as the standard time reference. Today, GMT is used practically identically to Coordinated Universal Time (UTC) for standard civil timekeeping. Several countries in Africa and Western Europe officially use GMT as their local time zone. Like UTC, standard GMT is not affected by daylight saving time.
GMT Time Differences Around the World
Because GMT is situated at a +0:00 offset, computing global time differences is straightforward. Here are a few notable comparisons:
- GMT is 5 hours ahead of Eastern Standard Time (EST) in North America.
- GMT is 5 hours and 30 minutes behind Indian Standard Time (IST).
- GMT is 8 hours behind Australian Western Standard Time (AWST).
- GMT is 9 hours behind Japan Standard Time (JST).
Frequently Asked Questions
What is the current time in GMT?
The exact current GMT can be seen on the live digital and analog clocks at the top of this page. It adjusts automatically and displays the correct zero-offset time every second.
Does GMT observe Daylight Saving Time?
No, true GMT itself does not change with the seasons. However, countries that use GMT as their winter time (like the United Kingdom) switch to British Summer Time (BST), which is GMT+1, during the warmer months.
Is GMT the same as UTC?
For everyday timekeeping, GMT and UTC are practically identical and share the exact same time. The primary difference is technical: UTC is a scientific time standard kept by atomic clocks, while GMT is officially a time zone.