1am GMT is 1:00 am UTC
1am GMT is 1:00 am UTC in Coordinated Universal Time. That answer holds on every day of the year, because these two zones never drift apart.
What time is 1am GMT in UTC?
It is 1:00 am. GMT and UTC read the same clock, so the reading does not move at all. 1am is the small hours in GMT, the deadest part of the night, while 1:00 am is the small hours in UTC, the deadest part of the night.
Spoken as military time, 1am is 0100 hours and the result is 0100 hours. The military convention exists precisely because "3 o'clock" is ambiguous twice over: once on the 12 hour clock and once across zones.
1am GMT to UTC in the hours either side
The four hours before and after 1am, in case the meeting moves. The whole window stays on the same day in UTC, so only the hour changes.
| GMT | UTC | UTC date | Working hours |
|---|---|---|---|
| 9:00 pm | 9:00 pm | same day | neither |
| 10:00 pm | 10:00 pm | same day | neither |
| 11:00 pm | 11:00 pm | same day | neither |
| 12:00 am | 12:00 am | same day | neither |
| 1:00 am (this page) | 1:00 am | same day | neither |
| 2:00 am | 2:00 am | same day | neither |
| 3:00 am | 3:00 am | same day | neither |
| 4:00 am | 4:00 am | same day | neither |
| 5:00 am | 5:00 am | same day | neither |
Is 1am GMT a good time to call UTC?
No. 1:00 am in UTC is the small hours, the deadest part of the night. Nobody is taking that call. the nearest sensible slot is a different hour entirely.
Does daylight saving change 1am GMT to UTC?
Not for this conversion. Sampled at 1am on every day of 2026, the gap between these two zones comes out the same every single time, so 1am GMT is 1:00 am UTC in January and in July alike.
Greenwich Mean Time does not move its clocks at all, so its UTC+0 offset holds every day of the year.
Coordinated Universal Time does not move its clocks at all, so its UTC+0 offset holds every day of the year.
1am UTC to GMT, the other way round
Running the question the other way is a different conversion, not a mirror image, because the two zones can be in different daylight saving states on the same date. 1am UTC is 1:00 am GMT, which is the same clock reading as the answer above. Neither Greenwich Mean Time nor Coordinated Universal Time observes daylight saving, so the abbreviations never change and the gap between them is fixed.
Questions
- What is 1am GMT in UTC?
- 1:00 am UTC.
- Does 1am GMT cross into another date in UTC?
- No. It stays on the same calendar day, September 23, 2026.
- Is 1am GMT always 1am UTC?
- Yes, on every day of the year. These two zones never change their distance from each other at this hour.
- How is 1am GMT written in 24 hour time?
- 01:00, and the answer in UTC is 01:00.
- Can I call UTC at that hour?
- 1:00 am is outside the 9 to 5 working day in UTC.
Other hours on this pair
GMT to UTC full conversion table · UTC to GMT · 1am UTC to GMT · All timezone conversions
12 and 24 hour converter · 8 hours from now · Today · Day counter