World Timezones

IRST to HKT Converter

Compare HKT 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
Hong Kong TimeHKT
Asia · UTC+8
12:36 pmFri, Jun 5
4a
5a
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
7p
8p
9p
10p
11p
12a
1a
2a
3a

Offset

The time difference between Iran Standard Time and Hong Kong Time is 4.5 hours.

4.5 hours

Iran Standard Time (IRST) is behind Hong Kong Time (HKT).

IRST: UTC+3:30

HKT: UTC+8

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

When to schedule

Business-hours overlap: 9 AM–1 PM in Iran Standard Time (1 PM–5 PM in Hong Kong Time).

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

Suggested time: 11:00 AM Iran Standard Time (3:30 PM Hong Kong Time).

Public holidays in 2026

National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.

Hong Kong

  • New Year's DayThu, Jan 1
  • Lunar New YearTue, Feb 17
  • Second day of Lunar New YearWed, Feb 18
  • Third day of Lunar New YearThu, Feb 19
  • Good FridayFri, Apr 3
  • Holy SaturdaySat, Apr 4
  • Ching Ming FestivalSat, Apr 4
  • Easter MondayMon, Apr 6
  • Labour DayFri, May 1
  • Buddha's BirthdayMon, May 25
  • Dragon Boat FestivalFri, Jun 19
  • Hong Kong Special Administrative Region Establishment DayWed, Jul 1
  • Day following the Mid-Autumn FestivalSat, Sep 26
  • National DayThu, Oct 1
  • Chung Yeung FestivalMon, Oct 19
  • Christmas DayFri, Dec 25
  • Boxing DaySat, Dec 26

About these zones

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

Hong Kong Time is also known as HKT. To call Hong Kong, dial +852.

Hong Kong Time is approximately 3,850 miles east of Iran Standard Time.

Quick reference

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

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

Daylight saving time

Neither Iran Standard Time nor Hong Kong 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
Hong Kong Time
Sunrise
5:40 AM
Sunset
7:06 PM
Day length
13h 26m

Daylight overlap: 9h 46m — 4:50 AM–2:36 PM in Iran Standard Time (9:20 AM–7:06 PM in Hong Kong Time). Both locations are in daylight during this window.

Cities in these zones

Cities in Iran 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 Hong Kong Time

  • HKG

Related conversions

Common conversions

What is 9:00 am IRST in HKT?
9:00 am IRST is 1:30 pm HKT.
What is 12:00 pm IRST in HKT?
12:00 pm IRST is 4:30 pm HKT.
What is 12:30 pm IRST in HKT?
12:30 pm IRST is 5:00 pm HKT.
What is 2:00 pm IRST in HKT?
2:00 pm IRST is 6:30 pm HKT.
What is 5:00 pm IRST in HKT?
5:00 pm IRST is 9:30 pm HKT.
What is 11:30 pm IRST in HKT?
11:30 pm IRST is 4:00 am HKT, the next day.