What is ICT in AST?
Atlantic Time is 10 hours behind
Indochina Time is on UTC+7:00 and Atlantic Time is on UTC−3:00 right now. Atlantic Time is on daylight saving, so its clocks read ADT. The gap changes during the year — see below.
- Time in Bangkok
- 7:03:33 PM
- Time in Halifax
- 9:03:33 AM
- Difference
- −10 h
- Next clock change
- November 1, 2026
Convert a time
ADT — Atlantic Time
9:00 am
ADT, Fri
When the difference changes
Indochina Time and Atlantic Time do not change their clocks on the same dates, so the gap between them is not the same all year. Most converters show only today’s figure. These are the periods ahead:
- Now – November 1, 2026Atlantic Time is 10 hours behind
- November 1, 2026 – March 14, 2027Atlantic Time is 11 hours behind
- March 14, 2027 – onwardsAtlantic Time is 10 hours behind
Periods shorter than a day are not listed. Each zone changes at its own local time, so on a date when both move there are a few hours when the gap is briefly something else.
Daylight saving
Indochina Time
Indochina Time stays on ICT all year, so its offset from UTC never moves.
Atlantic Time
Clocks go back one hour — 2:00 am becomes 1:00 am local time, and the zone is on AST after that.
ICT to AST conversion table
Every hour of Friday, September 25, 2026, converted from Indochina Time to Atlantic Time. 10 of the 24 hours fall on a different calendar day in Halifax, which is marked.
- 12:00 am ICT
- 2:00 pm ADT−1 day
- 1:00 am ICT
- 3:00 pm ADT−1 day
- 2:00 am ICT
- 4:00 pm ADT−1 day
- 3:00 am ICT
- 5:00 pm ADT−1 day
- 4:00 am ICT
- 6:00 pm ADT−1 day
- 5:00 am ICT
- 7:00 pm ADT−1 day
- 6:00 am ICT
- 8:00 pm ADT−1 day
- 7:00 am ICT
- 9:00 pm ADT−1 day
- 8:00 am ICT
- 10:00 pm ADT−1 day
- 9:00 am ICT
- 11:00 pm ADT−1 day
- 10:00 am ICT
- 12:00 am ADT
- 11:00 am ICT
- 1:00 am ADT
- 12:00 pm ICT
- 2:00 am ADT
- 1:00 pm ICT
- 3:00 am ADT
- 2:00 pm ICT
- 4:00 am ADT
- 3:00 pm ICT
- 5:00 am ADT
- 4:00 pm ICT
- 6:00 am ADT
- 5:00 pm ICT
- 7:00 am ADT
- 6:00 pm ICT
- 8:00 am ADT
- 7:00 pm ICT
- 9:00 am ADT
- 8:00 pm ICT
- 10:00 am ADT
- 9:00 pm ICT
- 11:00 am ADT
- 10:00 pm ICT
- 12:00 pm ADT
- 11:00 pm ICT
- 1:00 pm ADT
Scheduling between the two
There is no overlap between a nine-to-six working day in Bangkok and one in Halifax — the gap is too wide. A call has to sit early or late for one side. Early morning in Bangkok is the usual compromise, since that is late afternoon or evening in Halifax.
A note on AST: it can also mean Arabia Standard Time (UTC+3). This page means Atlantic Time.
Indochina Time (ICT) is used in Thailand, Vietnam, Cambodia and Laos
Atlantic Time (ADT) is used in Nova Scotia, New Brunswick and Puerto Rico
Other conversions
- AST to ICT
- ICT to UTC
- ICT to GMT
- ICT to EST
- ICT to CST
- ICT to MST
- ICT to PST
- ICT to AKST
- ICT to HST
- ICT to BST
- ICT to CET
- ICT to IST
- ICT to CST (China)
- ICT to JST
- ICT to AEST
- ICT to Mexico City
- ICT to BRT
- ICT to ART
- ICT to EET
- ICT to WET
- ICT to MSK
- ICT to TRT
- ICT to SAST
- ICT to WAT
- ICT to EAT
- ICT to GST
- ICT to PKT
- ICT to WIB
- ICT to SGT
- ICT to HKT
- ICT to KST
- ICT to PHT
- ICT to AWST
- ICT to ACST
- ICT to NZST
- All zones