World Timezones

IRST to SGT Converter

Compare SGT to IRST instead
Iran Standard Time8:06 amFri, Jun 5
Iran Standard TimeIRST
Middle East · UTC+3:30
8:06 amFri, Jun 5
12a
1a
2a
3a
4a
5a
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
7p
8p
9p
10p
11p
Singapore TimeSGT
Asia · UTC+8
12:36 pmFri, Jun 5
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 Iran Standard Time and Singapore Time is 4.5 hours.

4.5 hours

Iran Standard Time (IRST) is behind Singapore Time (SGT).

IRST: UTC+3:30

SGT: UTC+8

Neither Iran Standard Time nor Singapore Time is currently observing daylight saving time.

When to schedule

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

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

Suggested time: 11:00 AM Iran Standard Time (3:30 PM Singapore Time).

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

Iran Standard Time is also known as IRST. To call Iran, dial +98.

Singapore Time is also known as SGT. To call Singapore, dial +65.

Singapore Time is approximately 4,100 miles southeast of Iran Standard Time.

Quick reference

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

IRSTSGTDay
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 Iran Standard Time nor Singapore Time 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

Iran Standard Time
Sunrise
4:50 AM
Sunset
7:18 PM
Day length
14h 28m
Singapore Time
Sunrise
6:58 AM
Sunset
7:10 PM
Day length
12h 12m

Daylight overlap: 9h 50m — 4:50 AM–2:40 PM in Iran Standard Time (9:20 AM–7:10 PM in Singapore Time). Both locations are in daylight during this window.

Cities in these zones

Cities in Iran Standard Time

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