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GMT to EST converter
Greenwich Mean Time
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Eastern Time
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Eastern Time is 4 hours behind Greenwich Mean Time for most of the year, and 5 hours behind for part of it, because the two change their clocks on different dates (or only one of them changes at all).
When does the difference change?
In 2026:
- January 1 to March 7: Eastern Time is 5 hours behind Greenwich Mean Time
- March 8 to October 31: Eastern Time is 4 hours behind Greenwich Mean Time
- November 1 to December 31: Eastern Time is 5 hours behind Greenwich Mean Time
Questions
What time is 9 AM GMT in EST?
For most of the year, 9 AM Greenwich Mean Time is 5 AM Eastern Time. For part of the year it is 4 AM, because of daylight saving time.
How many hours ahead or behind is EST from GMT?
Eastern Time is 4 hours behind Greenwich Mean Time for most of the year, and 5 hours behind for part of it, because the two change their clocks on different dates (or only one of them changes at all).
Does the GMT to EST difference change?
Yes. It changes 2 times in 2026 because of daylight saving time.
About these time zones
GMT to EST, hour by hour
| Greenwich Mean Time | Eastern Time |
|---|---|
| 12 AM | 8 PM (previous day) |
| 1 AM | 9 PM (previous day) |
| 2 AM | 10 PM (previous day) |
| 3 AM | 11 PM (previous day) |
| 4 AM | 12 AM |
| 5 AM | 1 AM |
| 6 AM | 2 AM |
| 7 AM | 3 AM |
| 8 AM | 4 AM |
| 9 AM | 5 AM |
| 10 AM | 6 AM |
| 11 AM | 7 AM |
| 12 PM | 8 AM |
| 1 PM | 9 AM |
| 2 PM | 10 AM |
| 3 PM | 11 AM |
| 4 PM | 12 PM |
| 5 PM | 1 PM |
| 6 PM | 2 PM |
| 7 PM | 3 PM |
| 8 PM | 4 PM |
| 9 PM | 5 PM |
| 10 PM | 6 PM |
| 11 PM | 7 PM |
Based on the clocks on Monday, October 12, 2026. Use the converter above for another date.