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