World Timezones

Tehran to Singapore Converter

Compare Singapore to Tehran instead
Tehran7:03 amMon, Jun 8
TehranIRST
Iran · UTC+3:30
7:03 amMon, Jun 8
12a
1a
2a
3a
4a
5a
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
7p
8p
9p
10p
11p
SingaporeSGT
Singapore · UTC+8
11:33 amMon, Jun 8
4a
5a
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
7p
8p
9p
10p
11p
12a
1a
2a
3a

Offset

The time difference between Tehran and Singapore is 4.5 hours.

4.5 hours

Tehran (IRST) is behind Singapore (SGT).

IRST: UTC+3:30

SGT: UTC+8

Neither Tehran nor Singapore is currently observing daylight saving time.

When to schedule

Business-hours overlap: 9 AM–1 PM in Tehran (1 PM–5 PM in Singapore).

Both teams are in working hours during this window on weekdays.

Suggested time: 11:00 AM Tehran (3:30 PM Singapore).

Public holidays in 2026

National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.

Singapore

  • New Year's DayThu, Jan 1
  • Chinese New YearTue, Feb 17
  • Chinese New YearWed, Feb 18
  • Hari Raya PuasaFri, Mar 20
  • Good FridayFri, Apr 3
  • Labour DayFri, May 1
  • Hari Raya Haji (Tentative Date)Wed, May 27
  • National DayMon, Aug 10
  • DeepavaliMon, Nov 9
  • Christmas DayFri, Dec 25

About these zones

Tehran uses Iran Standard Time (IRST). To call Iran, dial +98.

Singapore uses Singapore Time (SGT). To call Singapore, dial +65.

Singapore is approximately 4,100 miles southeast of Tehran.

Quick reference

Full 24-hour conversion table — tap any time to open it in the converter.

TehranSingaporeDay
12:00 am4:30 amSame day
1:00 am5:30 amSame day
2:00 am6:30 amSame day
3:00 am7:30 amSame day
4:00 am8:30 amSame day
5:00 am9:30 amSame day
6:00 am10:30 amSame day
7:00 am11:30 amSame day
8:00 am12:30 pmSame day
9:00 am1:30 pmSame day
10:00 am2:30 pmSame day
11:00 am3:30 pmSame day
12:00 pm4:30 pmSame day
1:00 pm5:30 pmSame day
2:00 pm6:30 pmSame day
3:00 pm7:30 pmSame day
4:00 pm8:30 pmSame day
5:00 pm9:30 pmSame day
6:00 pm10:30 pmSame day
7:00 pm11:30 pmSame day
8:00 pm12:30 am+1 day
9:00 pm1:30 am+1 day
10:00 pm2:30 am+1 day
11:00 pm3:30 am+1 day

Daylight saving time

Neither Tehran nor Singapore observes daylight saving time. The offset between these zones remains constant year-round.

See the daylight saving time page for transition dates across every time zone.

Daylight today

Tehran
Sunrise
4:49 AM
Sunset
7:19 PM
Day length
14h 30m
Singapore
Sunrise
6:59 AM
Sunset
7:10 PM
Day length
12h 12m

Daylight overlap: 9h 51m — 4:49 AM–2:40 PM in Tehran (9:19 AM–7:10 PM in Singapore). Both locations are in daylight during this window.

Cities in these zones

Other cities in Iran Standard Time

Browse all cities to see the current local time anywhere.

Airports in these zones

Airports in Iran Standard Time

  • IKA
  • THR
  • MHD
  • IFN
  • PYK
  • TBZ

Airports in Singapore Time

  • SIN

Related conversions

Common conversions

What is 9:00 am Tehran in Singapore?
9:00 am Tehran is 1:30 pm Singapore.
What is 12:00 pm Tehran in Singapore?
12:00 pm Tehran is 4:30 pm Singapore.
What is 12:30 pm Tehran in Singapore?
12:30 pm Tehran is 5:00 pm Singapore.
What is 2:00 pm Tehran in Singapore?
2:00 pm Tehran is 6:30 pm Singapore.
What is 5:00 pm Tehran in Singapore?
5:00 pm Tehran is 9:30 pm Singapore.
What is 11:30 pm Tehran in Singapore?
11:30 pm Tehran is 4:00 am Singapore, the next day.