AST to ICT Converter

Converting Atlantic Standard Time to Indochina Time

Atlantic Standard Time (AST) and Indochina Time (ICT) are separated by a 11 hours time difference. ICT is 11 hours ahead of AST. AST is UTC-4, used in Canada, Puerto Rico, US Virgin Islands, while ICT is UTC+7, used in Thailand, Vietnam, Cambodia.

When converting from AST to ICT, the key reference points to remember are: 9:00 AM AST equals 8:00 PM ICT, 12:00 PM noon AST equals 11:00 PM ICT, and 5:00 PM AST equals 4:00 AM ICT. The conversion table above shows every hour of the day mapped between these two time zones.

Scheduling Across AST and ICT

For professionals scheduling meetings between AST and ICT, finding overlapping business hours is essential. Standard business hours are typically 9:00 AM to 5:00 PM in each time zone. Given the 11 hours difference, the window of overlap may be limited, making early morning or late evening calls necessary for one party. Use the highlighted working hours in the conversion table above to quickly identify suitable meeting times.

Daylight Saving Time Considerations

AST observes Daylight Saving Time, switching to ADT (UTC-3) during summer months. ICT does not observe DST, staying at UTC+7 year-round. During DST transitions, the time difference between these zones may temporarily change by 1 hour. Always verify the current offset during spring and fall transition periods.