Zone & HourGMT to EST Time Converter
EST is 5 hours behind of GMT.
GMT: Greenwich Mean Time, UTC+00:00.
EST: Eastern Standard Time, UTC−05:00.
For a city that changes clocks, use the date-aware city converter.
Convert a time
9:00 AM GMT = 4:00 AM EST (same day)
24-hour GMT to EST conversion table
These are fixed-offset examples. They apply whenever the two abbreviations have the exact meanings stated above.
| GMT · UTC+00:00 | EST · UTC−05:00 | Day |
|---|---|---|
| 12:00 AM | 7:00 PM | Previous day |
| 1:00 AM | 8:00 PM | Previous day |
| 2:00 AM | 9:00 PM | Previous day |
| 3:00 AM | 10:00 PM | Previous day |
| 4:00 AM | 11:00 PM | Previous day |
| 5:00 AM | 12:00 AM | Same day |
| 6:00 AM | 1:00 AM | Same day |
| 7:00 AM | 2:00 AM | Same day |
| 8:00 AM | 3:00 AM | Same day |
| 9:00 AM | 4:00 AM | Same day |
| 10:00 AM | 5:00 AM | Same day |
| 11:00 AM | 6:00 AM | Same day |
| 12:00 PM | 7:00 AM | Same day |
| 1:00 PM | 8:00 AM | Same day |
| 2:00 PM | 9:00 AM | Same day |
| 3:00 PM | 10:00 AM | Same day |
| 4:00 PM | 11:00 AM | Same day |
| 5:00 PM | 12:00 PM | Same day |
| 6:00 PM | 1:00 PM | Same day |
| 7:00 PM | 2:00 PM | Same day |
| 8:00 PM | 3:00 PM | Same day |
| 9:00 PM | 4:00 PM | Same day |
| 10:00 PM | 5:00 PM | Same day |
| 11:00 PM | 6:00 PM | Same day |
What GMT and EST mean
GMT: Greenwich Mean Time
GMT has a fixed zero offset. London observes BST during its daylight-saving season; London is not always on GMT. A representative location is London in winter, whose IANA identifier is Europe/London.
EST: Eastern Standard Time
EST means UTC−05:00. New York uses EDT (UTC−04:00) during daylight saving; choose the city converter for a date-aware result. A representative location is New York in winter, whose IANA identifier is America/New_York.
Common conversion examples
- 6:00 AM GMT becomes 1:00 AM EST.
- 9:00 AM GMT becomes 4:00 AM EST.
- 12:00 PM GMT becomes 7:00 AM EST.
- 6:00 PM GMT becomes 1:00 PM EST.
- 9:00 PM GMT becomes 4:00 PM EST.
Frequently asked questions
Does this table change for daylight saving?
No. The offsets attached to these abbreviations stay fixed. A city may switch to a differently named abbreviation. GMT is not a daylight-saving designation in the interpretation used here.
Should I put an abbreviation in a meeting invitation?
Use an IANA city time zone and a full date. Abbreviations are useful shorthand when everyone agrees on the meaning, but they do not carry the complete rules that a calendar needs for recurring events.
Why can the day change?
The difference is 300 minutes. Adding or subtracting that amount can move the destination time before midnight or beyond the end of the source day. The last column makes that change explicit.