The short answer
1am in British Summer Time is 3:30am in Tehran.
British Summer Time is 2 hours 30 minutes behind Tehran. It lands deep outside working hours in Tehran — see the best time to meet below for a friendlier slot.
British Summer Time☾
1am
Tehran☾
3:30am
Right now
10:53amBST · UTC+01:00 · Mon, Jun 22
1:23pm+03:30 · UTC+03:30 · Mon, Jun 22
Read across to convert
British Summer Time
BST · UTC+01:00
Tehran
+03:30 · UTC+03:30
Pinned1amBritish Summer Time=3:30amTehran
12amMon
2:30am
PINNED
1am
3:30am
2am
4:30am
3am
5:30am
4am
6:30am
5am
7:30am
6am
8:30am
7am
9:30am
WORK8am
10:30am
WORK9am
WORK11:30am
WORKNOW
10am
WORK12:30pm
WORK11am
WORK1:30pm
WORK12pm
WORK2:30pm
WORK1pm
WORK3:30pm
WORK2pm
WORK4:30pm
WORK3pm
WORK5:30pm
4pm
WORK6:30pm
5pm
7:30pm
6pm
8:30pm
7pm
9:30pm
8pm
10:30pm
9pm
11:30pm
10pm
12:30amTue ·+1d
11pm
1:30amTue ·+1d
daylightnightworking hoursoverlap
Best time to meet=
Best for a call
British Summer Time
9am–3pm
Tehran
11:30am–5:30pm
Popular conversions
Quick reference.
9amBritish Summer Time=11:30amTehran
12pmBritish Summer Time=2:30pmTehran
3pmBritish Summer Time=5:30pmTehran
5pmBritish Summer Time=7:30pmTehran
9pmBritish Summer Time=11:30pmTehran
In context
What each side covers.
British Summer Time
10:53amBST · UTC+01:00
Cities on this clock
Did you mean…? “BST” is shared by several places. This page shows British Summer Time (UK) — or switch to Bangladesh Standard Time.
Related converters
Other popular pairs.
Pacific Time
2:53am
India Standard Time
3:23pm
Pacific Time to India12 hours 30 minutes behind
Eastern Standard Time
5:53am
Central European Time
11:53am
Eastern Time to Central Europe6 hours behind
India Standard Time
3:23pm
Eastern Standard Time
5:53am
India to Eastern Time9 hours 30 minutes ahead
Greenwich Mean Time
10:53am
India Standard Time
3:23pm
London to India4 hours 30 minutes behind
Pacific Standard Time
2:53am
Eastern Standard Time
5:53am
Pacific to Eastern Time3 hours behind
Central European Time
11:53am
India Standard Time
3:23pm
Central Europe to India3 hours 30 minutes behind
Frequently asked
Quick answers about converting between British Summer Time and Tehran. Can't find what you need? Email [email protected].
- What is the time difference between British Summer Time and Tehran?
- British Summer Time is 2 hours 30 minutes behind Tehran right now. We always show the live, daylight-saving-correct difference, so this figure already accounts for whichever side is observing summer time today.
- When it's 1am in British Summer Time, what time is it in Tehran?
- 1am in British Summer Time is 3:30am in Tehran. It lands deep outside working hours in Tehran — see the best time to meet below for a friendlier slot. Use the hour-by-hour table above to read any other time across.
- What's the best time for a call between British Summer Time and Tehran?
- 9am–3pm in British Summer Time lines up with 11:30am–5:30pm in Tehran — both sides are inside a 9-to-5 working day.
- Does this account for daylight saving time?
- Yes. We track every clock change in both places, so the abbreviations you see — BST and +03:30 — are the ones actually in effect right now, not a fixed all-year value. When either side changes its clocks, this page updates automatically.
- Why is the date sometimes different on each side?
- When two places are far enough apart, the same moment can fall on different calendar days. That is why some conversions are marked "previous day" or "next day" — it is the same instant in time, read off two clocks that crossed midnight at different points.