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Convert Hong Kong Time to Iran Time

HKT · UTC+8 → IRST · UTC+3:30

HKT is 4 hours 30 minutes ahead of IRST

Hong Kong · UTC+8

Tuesday, 8 September 2026

Tehran · UTC+3:30

Tuesday, 8 September 2026

When are both sides at work?

0003060912151821
Hong KongUTC+8 · +08:00
0003060912151821
TehranUTC+3:30 · +03:30
1922010407101316

Shared working hours: 13:30–18:00 in Hong Kong is 09:00–13:30 in Tehran.

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

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15:06 Tue 8 Sep Hong Kong = 10:36 Tue 8 Sep Tehran

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Hour-by-hour conversion

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

About this conversion

HKT here means Hong Kong Time, represented by Hong Kong (Asia/Hong_Kong), currently UTC+8. IRST means Iran Time, represented by Tehran (Asia/Tehran), currently UTC+3:30.

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 Hong Kong; day boundaries are marked where the date differs.

Quick answers

  • 09:00 HKT is 04:30 IRST
  • 12:00 HKT is 07:30 IRST
  • 15:00 HKT is 10:30 IRST
  • 18:00 HKT is 13:30 IRST

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