10pm BST is 9:00 pm UTC
10pm BST is 9:00 pm UTC in Coordinated Universal Time. UTC is 1 hour behind BST today, and that gap changes during the year, so this is recomputed rather than assumed.
What time is 10pm BST in UTC?
It is 9:00 pm. UTC is 1 hour behind UK, so you subtract 1 hour from 10:00 pm and the date does not change. 10pm is late evening in UK, the wind-down before midnight, while 9:00 pm is late evening in UTC, the wind-down before midnight.
The 12 hour clock reuses every number twice, so 10pm and 10am differ only by the meridiem. Converting 10pm BST gives 9:00 pm UTC; converting 10am BST gives 9:00 am UTC. Losing the am or pm loses half the answer.
10pm BST to UTC in the hours either side
The four hours before and after 10pm, in case the meeting moves. Note that the calendar date does not stay put across this window: it changes partway through, which is exactly where scheduling mistakes come from.
| BST | UTC | UTC date | Working hours |
|---|---|---|---|
| 6:00 pm | 5:00 pm | same day | neither |
| 7:00 pm | 6:00 pm | same day | neither |
| 8:00 pm | 7:00 pm | same day | neither |
| 9:00 pm | 8:00 pm | same day | neither |
| 10:00 pm (this page) | 9:00 pm | same day | neither |
| 11:00 pm | 10:00 pm | same day | neither |
| 12:00 am | 11:00 pm | the previous day | neither |
| 1:00 am | 12:00 am | same day | neither |
| 2:00 am | 1:00 am | same day | neither |
Is 10pm BST a good time to call UTC?
No. 9:00 pm in UTC is late evening, the wind-down before midnight. Nobody is taking that call. The zones are 1 hour apart, so the nearest sensible slot is a different hour entirely.
Does daylight saving change 10pm BST to UTC?
Yes. Sampled at 10pm on every day of 2026, the gap takes 2 different values. Today it is 1 hour, which is why the answer above is dated rather than fixed.
UK Time is currently on BST and changes next on Sunday, October 25, 2026, when the clock falls back from 1:59 am to 1:00 am and the offset moves from UTC+1 to UTC+0.
Coordinated Universal Time does not move its clocks at all, so its UTC+0 offset holds every day of the year.
10pm UTC to BST, 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. 10pm UTC is 11:00 pm BST, which is a different reading from the answer above, because the two directions are separate questions. One wrinkle worth knowing: GMT and BST are two names for the same zone, not two zones. UK Time reads GMT in winter and BST in summer. When somebody types "bst to utc" they nearly always mean the zone rather than the literal winter offset, so this page resolves BST to Europe/London and UTC to Etc/UTC and applies whichever offset is genuinely in force on the day.
Questions
- What is 10pm BST in UTC?
- 9:00 pm UTC.
- Does 10pm BST cross into another date in UTC?
- No. It stays on the same calendar day, September 25, 2026.
- Is 10pm BST always 9pm UTC?
- No. The gap moves during the year, between no difference and 1 hour. Today it is 1 hour.
- What is 10pm BST in UTC?
- 21:00 UTC, because BST is currently UTC+1.
- Can I call UTC at that hour?
- 9:00 pm is outside the 9 to 5 working day in UTC.
Other hours on this pair
BST to UTC full conversion table · UTC to BST · 10pm UTC to BST · All timezone conversions
12 and 24 hour converter · 8 hours from now · Today · Day counter