Offset
The time difference between Tehran and Hong Kong is 4.5 hours.
Tehran (IRST) is behind Hong Kong (HKT).
IRST: UTC+3:30
HKT: UTC+8
Neither Tehran nor Hong Kong is currently observing daylight saving time.
When to schedule
Business-hours overlap: 9 AM–1 PM in Tehran (1 PM–5 PM in Hong Kong).
Both teams are in working hours during this window on weekdays.
Suggested time: 11:00 AM Tehran (3:30 PM Hong Kong).
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
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| Tehran | Hong Kong | Day |
|---|---|---|
| 12:00 am | 4:30 am | Same day |
| 1:00 am | 5:30 am | Same day |
| 2:00 am | 6:30 am | Same day |
| 3:00 am | 7:30 am | Same day |
| 4:00 am | 8:30 am | Same day |
| 5:00 am | 9:30 am | Same day |
| 6:00 am | 10:30 am | Same day |
| 7:00 am | 11:30 am | Same day |
| 8:00 am | 12:30 pm | Same day |
| 9:00 am | 1:30 pm | Same day |
| 10:00 am | 2:30 pm | Same day |
| 11:00 am | 3:30 pm | Same day |
| 12:00 pm | 4:30 pm | Same day |
| 1:00 pm | 5:30 pm | Same day |
| 2:00 pm | 6:30 pm | Same day |
| 3:00 pm | 7:30 pm | Same day |
| 4:00 pm | 8:30 pm | Same day |
| 5:00 pm | 9:30 pm | Same day |
| 6:00 pm | 10:30 pm | Same day |
| 7:00 pm | 11:30 pm | Same day |
| 8:00 pm | 12:30 am | +1 day |
| 9:00 pm | 1:30 am | +1 day |
| 10:00 pm | 2:30 am | +1 day |
| 11:00 pm | 3:30 am | +1 day |
Daylight saving time
Neither Tehran nor Hong Kong 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
- Sunrise
- 4:49 AM
- Sunset
- 7:19 PM
- Day length
- 14h 30m
- Sunrise
- 5:40 AM
- Sunset
- 7:07 PM
- Day length
- 13h 27m
Daylight overlap: 9h 48m — 4:49 AM–2:37 PM in Tehran (9:19 AM–7:07 PM in Hong Kong). Both locations are in daylight during this window.
Cities in these zones
Other cities in Hong Kong 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 Tehran in Hong Kong?
- 9:00 am Tehran is 1:30 pm Hong Kong.
- What is 12:00 pm Tehran in Hong Kong?
- 12:00 pm Tehran is 4:30 pm Hong Kong.
- What is 12:30 pm Tehran in Hong Kong?
- 12:30 pm Tehran is 5:00 pm Hong Kong.
- What is 2:00 pm Tehran in Hong Kong?
- 2:00 pm Tehran is 6:30 pm Hong Kong.
- What is 5:00 pm Tehran in Hong Kong?
- 5:00 pm Tehran is 9:30 pm Hong Kong.
- What is 11:30 pm Tehran in Hong Kong?
- 11:30 pm Tehran is 4:00 am Hong Kong, the next day.