AST to ICT Converter & Meeting Planner
Quick answer: 9:00 AM AST = 8:00 PM ICT (fixed -04:00 standard offset — not DST-adjusted). Use the interactive converter below for DST-aware local-time scheduling.
Planning a call or meeting between Atlantic Standard Time (AST) and Indochina Time (ICT)? You need to account for the standard time difference. Indochina Time is normally 11 hours ahead of Atlantic Standard Time. Whether you are coordinating between teams in Halifax and San Juan and Bangkok and Ho Chi Minh City, our live tool has you covered. Use our interactive overlap studio below to find the perfect waking hours for both regions, taking into account any seasonal Daylight Saving Time (DST) changes.
24-Hour Conversion Table
Quick reference: 12:00 AM AST = 11:00 AM ICT. The full 24-hour AST to ICT table below uses fixed standard offsets for exact abbreviation searches.
Example: 3:00 PM AST = 2:00 AM ICT (+1 day).
| AST Time | ICT Time |
|---|---|
| 12:00 AM (00:00) | 11:00 AM (11:00) |
| 1:00 AM (01:00) | 12:00 PM (12:00) |
| 2:00 AM (02:00) | 1:00 PM (13:00) |
| 3:00 AM (03:00) | 2:00 PM (14:00) |
| 4:00 AM (04:00) | 3:00 PM (15:00) |
| 5:00 AM (05:00) | 4:00 PM (16:00) |
| 6:00 AM (06:00) | 5:00 PM (17:00) |
| 7:00 AM (07:00) | 6:00 PM (18:00) |
| 8:00 AM (08:00) | 7:00 PM (19:00) |
| 9:00 AM (09:00) | 8:00 PM (20:00) |
| 10:00 AM (10:00) | 9:00 PM (21:00) |
| 11:00 AM (11:00) | 10:00 PM (22:00) |
| 12:00 PM (12:00) | 11:00 PM (23:00) |
| 1:00 PM (13:00) | 12:00 AM (00:00)+1 day |
| 2:00 PM (14:00) | 1:00 AM (01:00)+1 day |
| 3:00 PM (15:00) | 2:00 AM (02:00)+1 day |
| 4:00 PM (16:00) | 3:00 AM (03:00)+1 day |
| 5:00 PM (17:00) | 4:00 AM (04:00)+1 day |
| 6:00 PM (18:00) | 5:00 AM (05:00)+1 day |
| 7:00 PM (19:00) | 6:00 AM (06:00)+1 day |
| 8:00 PM (20:00) | 7:00 AM (07:00)+1 day |
| 9:00 PM (21:00) | 8:00 AM (08:00)+1 day |
| 10:00 PM (22:00) | 9:00 AM (09:00)+1 day |
| 11:00 PM (23:00) | 10:00 AM (10:00)+1 day |
Best time to call Bangkok from Halifax
For most work calls, compare the normal business day in Halifax (AST) with the business day in Bangkok (ICT). AST commonly covers North America, Caribbean, while ICT is mainly associated with Southeast Asia, Indochina Peninsula.
⚠️ Note: 2026-07-05 is not a normal workday in one or both regions based on their configured calendar. The overlap below should be treated as a reference, not a guaranteed office-hours window.
⚠️ There is no clean same-day business-hours overlap on 2026-07-05. A practical compromise is around 11:00 PM AST, which reaches 9:00 AM ICT near the start of their workday.
- DST Safety: AST or ICT may shift during Daylight Saving Time. Always confirm the converted time for your specific date.
- Stock Exchange of Thailand (SET): 10:00-16:30 local time in Bangkok.
🔥 Popular AST & ICT Converters
Frequently searched time zone conversions related to your search.
Related Time Converters
Explore nearby time zone offsets and reverse conversions related to AST and ICT.
Frequently Asked Questions
What is the time difference between AST and ICT?
During standard time, Indochina Time is 11 hours ahead of Atlantic Standard Time.
Does the Caribbean observe Daylight Saving Time?
The vast majority of Caribbean nations and territories — including Puerto Rico, the Dominican Republic, the US Virgin Islands, Trinidad and Tobago, and Barbados — do not observe Daylight Saving Time and remain on AST (UTC-4) year-round. This means these territories share the same clock as Halifax only during the Atlantic Standard Time window in winter, diverging by one hour once Canada and Bermuda advance to ADT each spring.
What is the difference between AST and ADT?
AST (Atlantic Standard Time) is the standard winter offset at UTC-4:00, observed from the first Sunday in November through the second Sunday in March across all AST regions. ADT (Atlantic Daylight Time) is the summer offset at UTC-3:00, applied by Eastern Canadian provinces and Bermuda when they advance their clocks by one hour during Daylight Saving Time.
Which countries use Indochina Time (ICT)?
Indochina Time is the official standard time for four Southeast Asian nations: Thailand, Vietnam, Cambodia, and Laos. All four countries observe a single, unified UTC+07:00 offset with no regional subdivisions.
Do Thailand and Vietnam observe Daylight Saving Time?
Neither Thailand nor Vietnam observes Daylight Saving Time, and neither do Cambodia or Laos. ICT remains fixed at UTC+07:00 throughout the entire year, with no seasonal clock changes.