World Timezones

IRST to AST Converter

Compare AST 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
Arabia Standard TimeAST
Middle East · UTC+3
7:36 amFri, Jun 5
11p
12a
1a
2a
3a
4a
5a
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
7p
8p
9p
10p

Offset

The time difference between Iran Standard Time and Arabia Standard Time is 0.5 hours.

0.5 hours

Iran Standard Time (IRST) is ahead of Arabia Standard Time (AST).

IRST: UTC+3:30

AST: UTC+3

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

When to schedule

Business-hours overlap: 10 AM–5 PM in Iran Standard Time (9 AM–4 PM in Arabia Standard Time).

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

Suggested time: 1:00 PM Iran Standard Time (12:30 PM Arabia Standard Time).

Note: the working week in Saudi Arabia runs Sunday–Thursday; Friday–Saturday is the weekend, so overlap on those days is limited.

About these zones

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

Arabia Standard Time is also known as AST. To call Saudi Arabia, dial +966.

Arabia Standard Time is approximately 800 miles south of Iran Standard Time.

Quick reference

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

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

Daylight saving time

Neither Iran Standard Time nor Arabia Standard 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
Arabia Standard Time
Sunrise
5:05 AM
Sunset
6:41 PM
Day length
13h 36m

Daylight overlap: 13h 36m — 5:35 AM–7:11 PM in Iran Standard Time (5:05 AM–6:41 PM in Arabia Standard Time). Both locations are in daylight during this window.

Cities in these zones

Cities in Iran Standard Time

Cities in Arabia 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 Arabia Standard Time

  • JED
  • RUH
  • MED
  • DMM

Related conversions

Common conversions

What is 9:00 am IRST in AST?
9:00 am IRST is 8:30 am AST.
What is 12:00 pm IRST in AST?
12:00 pm IRST is 11:30 am AST.
What is 12:30 pm IRST in AST?
12:30 pm IRST is 12:00 pm AST.
What is 2:00 pm IRST in AST?
2:00 pm IRST is 1:30 pm AST.
What is 5:00 pm IRST in AST?
5:00 pm IRST is 4:30 pm AST.
What is 11:30 pm IRST in AST?
11:30 pm IRST is 11:00 pm AST.