The short answer
1am in Singapore Time is 8:30pm in Tehran on the previous day.
Singapore Time is 4 hours 30 minutes ahead of Tehran. That's already evening in Tehran, after the typical working day ends.
Singapore Time☾
1am
Tehran☾
8:30pm
previous day
Right now
3:55pm+08:00 · UTC+08:00 · Mon, Jun 22
11:25am+03:30 · UTC+03:30 · Mon, Jun 22
Read across to convert
Singapore Time
+08:00 · UTC+08:00
Tehran
+03:30 · UTC+03:30
Pinned1amSingapore Time=8:30pmTehran · Sun (previous day)
12amMon
7:30pmSun ·−1d
PINNED
1am
8:30pmSun ·−1d
2am
9:30pmSun ·−1d
3am
10:30pmSun ·−1d
4am
11:30pmSun ·−1d
5am
12:30amMon
6am
1:30am
7am
2:30am
8am
3:30am
9am
WORK4:30am
10am
WORK5:30am
11am
WORK6:30am
12pm
WORK7:30am
1pm
WORK8:30am
2pm
WORK9:30am
WORKNOW
3pm
WORK10:30am
WORK4pm
WORK11:30am
WORK5pm
12:30pm
WORK6pm
1:30pm
WORK7pm
2:30pm
WORK8pm
3:30pm
WORK9pm
4:30pm
WORK10pm
5:30pm
11pm
6:30pm
daylightnightworking hoursoverlap
Best time to meet=
Best for a call
Singapore Time
2pm–5pm
Tehran
9:30am–12:30pm
Popular conversions
Quick reference.
9amSingapore Time=4:30amTehran
12pmSingapore Time=7:30amTehran
3pmSingapore Time=10:30amTehran
5pmSingapore Time=12:30pmTehran
9pmSingapore Time=4:30pmTehran
In context
What each side covers.
Related converters
Other popular pairs.
Pacific Time
12:55am
India Standard Time
1:25pm
Pacific Time to India12 hours 30 minutes behind
Eastern Standard Time
3:55am
Central European Time
9:55am
Eastern Time to Central Europe6 hours behind
India Standard Time
1:25pm
Eastern Standard Time
3:55am
India to Eastern Time9 hours 30 minutes ahead
Greenwich Mean Time
8:55am
India Standard Time
1:25pm
London to India4 hours 30 minutes behind
Pacific Standard Time
12:55am
Eastern Standard Time
3:55am
Pacific to Eastern Time3 hours behind
Central European Time
9:55am
India Standard Time
1:25pm
Central Europe to India3 hours 30 minutes behind
Frequently asked
Quick answers about converting between Singapore Time and Tehran. Can't find what you need? Email [email protected].
- What is the time difference between Singapore Time and Tehran?
- Singapore Time is 4 hours 30 minutes ahead of 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 Singapore Time, what time is it in Tehran?
- 1am in Singapore Time is 8:30pm in Tehran on the previous day. That's already evening in Tehran, after the typical working day ends. Use the hour-by-hour table above to read any other time across.
- What's the best time for a call between Singapore Time and Tehran?
- 2pm–5pm in Singapore Time lines up with 9:30am–12:30pm 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 — +08:00 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.