ACST to IRST converter

Australian Central Time (Adelaide) to Iran Time (Tehran).

ACST10:37 AMSat 31 Oct 2026

→

IRST3:37 AMSat 31 Oct 2026

IRST is 7 h behind ACST.

Pick a time in ACST

⇄ IRST to ACST

9:00 AM ACST = 2:00 AM IRST same day

Best time to meet

The best time to meet is between 4:00 PM and 5:00 PM ACST, which is 9:00 AM to 10:00 AM IRST. Both sides are then inside 9 AM to 5 PM.

ACST to IRST time table

For 31 Oct 2026. Green rows: both sides between 9 AM and 5 PM.

ACST	IRST
12:00 AM ACST	5:00 PM IRST previous day
1:00 AM ACST	6:00 PM IRST previous day
2:00 AM ACST	7:00 PM IRST previous day
3:00 AM ACST	8:00 PM IRST previous day
4:00 AM ACST	9:00 PM IRST previous day
5:00 AM ACST	10:00 PM IRST previous day
6:00 AM ACST	11:00 PM IRST previous day
7:00 AM ACST	12:00 AM IRST
8:00 AM ACST	1:00 AM IRST
9:00 AM ACST	2:00 AM IRST
10:00 AM ACST	3:00 AM IRST
11:00 AM ACST	4:00 AM IRST
12:00 PM ACST	5:00 AM IRST
1:00 PM ACST	6:00 AM IRST
2:00 PM ACST	7:00 AM IRST
3:00 PM ACST	8:00 AM IRST
4:00 PM ACST	9:00 AM IRST
5:00 PM ACST	10:00 AM IRST
6:00 PM ACST	11:00 AM IRST
7:00 PM ACST	12:00 PM IRST
8:00 PM ACST	1:00 PM IRST
9:00 PM ACST	2:00 PM IRST
10:00 PM ACST	3:00 PM IRST
11:00 PM ACST	4:00 PM IRST

Quick answers

9:00 AM ACST = 2:00 AM IRST
12:00 PM ACST = 5:00 AM IRST
3:00 PM ACST = 8:00 AM IRST
5:00 PM ACST = 10:00 AM IRST
9:00 AM IRST = 4:00 PM ACST
12:00 PM IRST = 7:00 PM ACST
5:00 PM IRST = 12:00 AM ACST (next day)

Does the gap change during the year?

Yes, because of daylight saving. Until 4 Apr 2027: IRST is 7 h behind ACST. From 4 Apr 2027 to 3 Oct 2027: IRST is 6 h behind ACST. From 3 Oct 2027 to 2 Apr 2028: IRST is 7 h behind ACST.

ACST next changes its clocks on 4 Apr 2027 (back 1 h, to UTC+9:30), then on 3 Oct 2027 (forward 1 h, to UTC+10:30). IRST does not change its clocks.

About ACST and IRST

ACST here means Australian Central Time, the clock in Adelaide. Right now it is UTC+10:30. Strictly, ACST is the winter name; in summer these places use ACDT. This page follows their real clock all year.

IRST here means Iran Time, the clock in Tehran. Right now it is UTC+3:30. It has no daylight saving.

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