HST to IRST converter

Hawaii Time (Honolulu) to Iran Time (Tehran).

HST2:07 PMFri 30 Oct 2026

→

IRST3:37 AMSat 31 Oct 2026

IRST is 13 h 30 min ahead of HST.

Pick a time in HST

⇄ IRST to HST

9:00 AM HST = 10:30 PM IRST same day

Best time to meet

No hour falls inside 9 AM to 5 PM in both places, so one side always meets outside office hours.

HST to IRST time table

For 30 Oct 2026. Green rows: both sides between 9 AM and 5 PM.

HST	IRST
12:00 AM HST	1:30 PM IRST
1:00 AM HST	2:30 PM IRST
2:00 AM HST	3:30 PM IRST
3:00 AM HST	4:30 PM IRST
4:00 AM HST	5:30 PM IRST
5:00 AM HST	6:30 PM IRST
6:00 AM HST	7:30 PM IRST
7:00 AM HST	8:30 PM IRST
8:00 AM HST	9:30 PM IRST
9:00 AM HST	10:30 PM IRST
10:00 AM HST	11:30 PM IRST
11:00 AM HST	12:30 AM IRST next day
12:00 PM HST	1:30 AM IRST next day
1:00 PM HST	2:30 AM IRST next day
2:00 PM HST	3:30 AM IRST next day
3:00 PM HST	4:30 AM IRST next day
4:00 PM HST	5:30 AM IRST next day
5:00 PM HST	6:30 AM IRST next day
6:00 PM HST	7:30 AM IRST next day
7:00 PM HST	8:30 AM IRST next day
8:00 PM HST	9:30 AM IRST next day
9:00 PM HST	10:30 AM IRST next day
10:00 PM HST	11:30 AM IRST next day
11:00 PM HST	12:30 PM IRST next day

Quick answers

9:00 AM HST = 10:30 PM IRST
12:00 PM HST = 1:30 AM IRST (next day)
3:00 PM HST = 4:30 AM IRST (next day)
5:00 PM HST = 6:30 AM IRST (next day)
9:00 AM IRST = 7:30 PM HST (previous day)
12:00 PM IRST = 10:30 PM HST (previous day)
5:00 PM IRST = 3:30 AM HST

Does the gap change during the year?

No. IRST is 13 h 30 min ahead of HST all year.

HST does not change its clocks. IRST does not change its clocks.

About HST and IRST

HST here means Hawaii Time, the clock in Honolulu. Right now it is UTC−10. It has no daylight saving.

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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