The short answer
4pm in Iran Standard Time is 1:30pm in Greenwich Mean Time.
Iran Standard Time is 2 hours 30 minutes ahead of Greenwich Mean Time. Both sides are inside the standard 9-to-5 working day, so this is a sociable time for a call in both places.
Iran Standard Time☀
4pm
Greenwich Mean Time☀
1:30pm
Right now
5:04pm+03:30 · UTC+03:30 · Wed, Jun 24
2:34pmBST · UTC+01:00 · Wed, Jun 24
Read across to convert
Iran Standard Time
+03:30 · UTC+03:30
Greenwich Mean Time
BST · UTC+01:00
Pinned4pmIran Standard Time=1:30pmGreenwich Mean Time
12amWed
9:30pmTue ·−1d
1am
10:30pmTue ·−1d
2am
11:30pmTue ·−1d
3am
12:30amWed
4am
1:30am
5am
2:30am
6am
3:30am
7am
4:30am
8am
5:30am
9am
WORK6:30am
10am
WORK7:30am
11am
WORK8:30am
12pm
WORK9:30am
WORK1pm
WORK10:30am
WORK2pm
WORK11:30am
WORK3pm
WORK12:30pm
WORKPINNED
4pm
WORK1:30pm
WORKNOW
5pm
2:30pm
WORK6pm
3:30pm
WORK7pm
4:30pm
WORK8pm
5:30pm
9pm
6:30pm
10pm
7:30pm
11pm
8:30pm
daylightnightworking hoursoverlap
Best time to meet=
Best for a call
Iran Standard Time
12pm–5pm
Greenwich Mean Time
9:30am–2:30pm
Popular conversions
Quick reference.
9amIran Standard Time=6:30amGreenwich Mean Time
12pmIran Standard Time=9:30amGreenwich Mean Time
3pmIran Standard Time=12:30pmGreenwich Mean Time
5pmIran Standard Time=2:30pmGreenwich Mean Time
9pmIran Standard Time=6:30pmGreenwich Mean Time
In context
What each side covers.
Iran Standard Time
5:04pm+03:30 · UTC+03:30
Greenwich Mean Time
2:34pmBST · UTC+01:00
Cities on this clock
Related converters
Other popular pairs.
Pacific Time
6:34am
India Standard Time
7:04pm
Pacific Time to India12 hours 30 minutes behind
Eastern Standard Time
9:34am
Central European Time
3:34pm
Eastern Time to Central Europe6 hours behind
India Standard Time
7:04pm
Eastern Standard Time
9:34am
India to Eastern Time9 hours 30 minutes ahead
Greenwich Mean Time
2:34pm
India Standard Time
7:04pm
London to India4 hours 30 minutes behind
Pacific Standard Time
6:34am
Eastern Standard Time
9:34am
Pacific to Eastern Time3 hours behind
Central European Time
3:34pm
India Standard Time
7:04pm
Central Europe to India3 hours 30 minutes behind
Frequently asked
Quick answers about converting between Iran Standard Time and Greenwich Mean Time. Can't find what you need? Email [email protected].
- What is the time difference between Iran Standard Time and Greenwich Mean Time?
- Iran Standard Time is 2 hours 30 minutes ahead of Greenwich Mean Time 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 4pm in Iran Standard Time, what time is it in Greenwich Mean Time?
- 4pm in Iran Standard Time is 1:30pm in Greenwich Mean Time. Both sides are inside the standard 9-to-5 working day, so this is a sociable time for a call in both places. Use the hour-by-hour table above to read any other time across.
- What's the best time for a call between Iran Standard Time and Greenwich Mean Time?
- 12pm–5pm in Iran Standard Time lines up with 9:30am–2:30pm in Greenwich Mean Time — 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 — +03:30 and BST — 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.