From
AST / ADT
Time Converter
AST to UTC Time Converter
Convert Atlantic Time to UTC with a live clock and clean permalinks.
To
UTC
When it is 7:30 AM in Atlantic Time, it is 10:30 AM in UTC.
AST to UTC at a glance
UTC is 3 hours ahead of Atlantic Time. If someone gives you a time in Atlantic Time, move the clock by 3 hours to read it in UTC. A 9:00 AM start in Halifax becomes 12:00 PM in London.
What Atlantic Time covers
Atlantic Time is used in eastern Canada and parts of the Caribbean. Halifax is a common city reference for it. It matters when scheduling across North America and island markets farther east.
What UTC covers
UTC is the global reference clock used to compare time zones around the world. It does not change for daylight saving time. It is the safest format for international schedules, APIs, databases, and server logs.
Quick answers
What is the time difference between AST and UTC?
UTC is 3 hours ahead of Atlantic Time.
What happens to a 3:00 PM meeting in AST?
It lands at 6:00 PM in UTC.
Does daylight saving time matter for AST to UTC?
Atlantic Time and UTC are shown using the offsets that are active right now, so the result already reflects any daylight saving change in effect today.