Offset
The time difference between Indochina Time and Atlantic Time is 10 hours.
Indochina Time (ICT) is ahead of Atlantic Time (ADT).
ICT: UTC+7
ADT: UTC-3
Atlantic Time is currently observing daylight saving time; Indochina Time is not.
When to schedule
Standard business hours (9 AM–5 PM, Mon–Fri) in Indochina Time and Atlantic Time don't overlap on the same weekday. Atlantic Time is 10 hours behind Indochina Time.
With some flexibility, there’s a workable window outside standard hours:
- 5 PM–8 PM in Indochina Time (7 AM–10 AM in Atlantic Time) — suggest 6:00 PM Indochina Time (8:00 AM Atlantic Time).
This means an early start or late finish for one side, but it’s a reasonable slot for a one-off meeting.
This window may shift by an hour during daylight saving 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.
Canada
- New Year's DayThu, Jan 1
- Good FridayFri, Apr 3
- Victoria DayMon, May 18
- Canada DayWed, Jul 1
- Labour DayMon, Sep 7
- National Day for Truth and ReconciliationWed, Sep 30
- ThanksgivingMon, Oct 12
- Christmas DayFri, Dec 25
About these zones
Indochina Time is also known as ICT. To call Thailand, dial +66.
Atlantic Time is also known as AST, or ADT. To call Canada, dial +1.
Atlantic Time is approximately 8,300 miles north of Indochina Time.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| ICT | AST-ATLANTIC | Day |
|---|---|---|
| 12:00 am | 2:00 pm | -1 day |
| 1:00 am | 3:00 pm | -1 day |
| 2:00 am | 4:00 pm | -1 day |
| 3:00 am | 5:00 pm | -1 day |
| 4:00 am | 6:00 pm | -1 day |
| 5:00 am | 7:00 pm | -1 day |
| 6:00 am | 8:00 pm | -1 day |
| 7:00 am | 9:00 pm | -1 day |
| 8:00 am | 10:00 pm | -1 day |
| 9:00 am | 11:00 pm | -1 day |
| 10:00 am | 12:00 am | Same day |
| 11:00 am | 1:00 am | Same day |
| 12:00 pm | 2:00 am | Same day |
| 1:00 pm | 3:00 am | Same day |
| 2:00 pm | 4:00 am | Same day |
| 3:00 pm | 5:00 am | Same day |
| 4:00 pm | 6:00 am | Same day |
| 5:00 pm | 7:00 am | Same day |
| 6:00 pm | 8:00 am | Same day |
| 7:00 pm | 9:00 am | Same day |
| 8:00 pm | 10:00 am | Same day |
| 9:00 pm | 11:00 am | Same day |
| 10:00 pm | 12:00 pm | Same day |
| 11:00 pm | 1:00 pm | Same day |
Daylight saving time
Atlantic Time observes daylight saving time; Indochina Time does not. The offset between the two zones changes when Atlantic Time transitions: on Sunday, November 1, 2026, clocks fall back from ADT to AST.
See the daylight saving time page for transition dates across every time zone.
Daylight today
- Sunrise
- 5:50 AM
- Sunset
- 6:44 PM
- Day length
- 12h 54m
- Sunrise
- 5:31 AM
- Sunset
- 8:56 PM
- Day length
- 15h 25m
Daylight overlap: 3h 13m — 3:31 PM–6:44 PM in Indochina Time (5:31 AM–8:44 AM in Atlantic Time). Both locations are in daylight during this window.
Cities in these zones
Cities in Indochina Time
Cities in Atlantic Time
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in Indochina Time
- HAN
- BKK
- DMK
- HPH
Airports in Atlantic Time
- YHZ
Related conversions
Common conversions
- What is 9:00 am ICT in AST-ATLANTIC?
- 9:00 am ICT is 11:00 pm AST-ATLANTIC, the previous day.
- What is 12:00 pm ICT in AST-ATLANTIC?
- 12:00 pm ICT is 2:00 am AST-ATLANTIC.
- What is 12:30 pm ICT in AST-ATLANTIC?
- 12:30 pm ICT is 2:30 am AST-ATLANTIC.
- What is 2:00 pm ICT in AST-ATLANTIC?
- 2:00 pm ICT is 4:00 am AST-ATLANTIC.
- What is 5:00 pm ICT in AST-ATLANTIC?
- 5:00 pm ICT is 7:00 am AST-ATLANTIC.
- What is 11:30 pm ICT in AST-ATLANTIC?
- 11:30 pm ICT is 1:30 pm AST-ATLANTIC.