Offset
The time difference between Iran Standard Time and Indochina Time is 3.5 hours.
Iran Standard Time (IRST) is behind Indochina Time (ICT).
IRST: UTC+3:30
ICT: UTC+7
Neither Iran Standard Time nor Indochina Time is currently observing daylight saving time.
When to schedule
Business-hours overlap: 9 AM–2 PM in Iran Standard Time (12 PM–5 PM in Indochina Time).
Both teams are in working hours during this window on weekdays.
Suggested time: 11:00 AM Iran Standard Time (2:30 PM Indochina Time).
About these zones
Iran Standard Time is also known as IRST. To call Iran, dial +98.
Indochina Time is also known as ICT. To call Thailand, dial +66.
Indochina Time is approximately 3,400 miles east of Iran Standard Time.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| IRST | ICT | Day |
|---|---|---|
| 12:00 am | 3:30 am | Same day |
| 1:00 am | 4:30 am | Same day |
| 2:00 am | 5:30 am | Same day |
| 3:00 am | 6:30 am | Same day |
| 4:00 am | 7:30 am | Same day |
| 5:00 am | 8:30 am | Same day |
| 6:00 am | 9:30 am | Same day |
| 7:00 am | 10:30 am | Same day |
| 8:00 am | 11:30 am | Same day |
| 9:00 am | 12:30 pm | Same day |
| 10:00 am | 1:30 pm | Same day |
| 11:00 am | 2:30 pm | Same day |
| 12:00 pm | 3:30 pm | Same day |
| 1:00 pm | 4:30 pm | Same day |
| 2:00 pm | 5:30 pm | Same day |
| 3:00 pm | 6:30 pm | Same day |
| 4:00 pm | 7:30 pm | Same day |
| 5:00 pm | 8:30 pm | Same day |
| 6:00 pm | 9:30 pm | Same day |
| 7:00 pm | 10:30 pm | Same day |
| 8:00 pm | 11:30 pm | Same day |
| 9:00 pm | 12:30 am | +1 day |
| 10:00 pm | 1:30 am | +1 day |
| 11:00 pm | 2:30 am | +1 day |
Daylight saving time
Neither Iran Standard Time nor Indochina 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
- Sunrise
- 4:50 AM
- Sunset
- 7:18 PM
- Day length
- 14h 28m
- Sunrise
- 5:50 AM
- Sunset
- 6:44 PM
- Day length
- 12h 54m
Daylight overlap: 10h 24m — 4:50 AM–3:14 PM in Iran Standard Time (8:20 AM–6:44 PM in Indochina Time). Both locations are in daylight during this window.
Cities in these zones
Cities in Indochina 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 Indochina Time
- HAN
- BKK
- DMK
- HPH
Related conversions
Common conversions
- What is 9:00 am IRST in ICT?
- 9:00 am IRST is 12:30 pm ICT.
- What is 12:00 pm IRST in ICT?
- 12:00 pm IRST is 3:30 pm ICT.
- What is 12:30 pm IRST in ICT?
- 12:30 pm IRST is 4:00 pm ICT.
- What is 2:00 pm IRST in ICT?
- 2:00 pm IRST is 5:30 pm ICT.
- What is 5:00 pm IRST in ICT?
- 5:00 pm IRST is 8:30 pm ICT.
- What is 11:30 pm IRST in ICT?
- 11:30 pm IRST is 3:00 am ICT, the next day.