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Convert Hawaii-Aleutian Time to Iran Time

HAST · UTC−9 → IRST · UTC+3:30

HAST is 12 hours 30 minutes behind IRST

Adak · HADT

Monday, 7 September 2026

Tehran · UTC+3:30

Tuesday, 8 September 2026

When are both sides at work?

0003060912151821
AdakHADT · -09:00
0003060912151821
TehranUTC+3:30 · +03:30
1215182100030609

No overlap in standard working hours. Closest workable window: 20:30–23:00 in Adak, which is 09:00–11:30 in Tehran.

Working (09–18) Awake, off the clock Asleep (23–07)

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22:06 Mon 7 Sep Adak = 10:36 Tue 8 Sep Tehran

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Hour-by-hour conversion

Adak (HAST)Tehran (IRST)
00:0012:30
01:0013:30
02:0014:30
03:0015:30
04:0016:30
05:0017:30
06:0018:30
07:0019:30
08:0020:30
09:0021:30
10:0022:30
11:0023:30
12:0000:30next day
13:0001:30next day
14:0002:30next day
15:0003:30next day
16:0004:30next day
17:0005:30next day
18:0006:30next day
19:0007:30next day
20:0008:30next day
21:0009:30next day
22:0010:30next dayNow
23:0011:30next day

About this conversion

HAST here means Hawaii-Aleutian Time, represented by Adak (America/Adak), currently UTC−9. IRST means Iran Time, represented by Tehran (Asia/Tehran), currently UTC+3:30.

HAST is used by 2 zones, including United States. If you meant a different one, see every meaning of HAST.

Working hours are shown as 09:00–18:00 local, and sleeping hours as 23:00–07:00. The hour table is anchored on the current day in Adak; day boundaries are marked where the date differs.

Quick answers

  • 09:00 HAST is 21:30 IRST
  • 12:00 HAST is 00:30 IRST
  • 15:00 HAST is 03:30 IRST
  • 18:00 HAST is 06:30 IRST

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