Atlantic Time (AT) to Local Time Converter
Pick a time below. Each page shows that AT time in your own time zone, worked out by your browser.
Atlantic Time (AT): what you need to know
Atlantic Time switches between standard and daylight time. Today it is UTC-03:00. It covers Halifax, Bermuda, Puerto Rico (no DST).
Daylight saving time in 2026
On Sunday, March 8, 2026 at 2:00 AM, clocks go forward 1 hour to 3:00 AM. The offset changes from UTC-04:00 to UTC-03:00.
On Sunday, November 1, 2026 at 2:00 AM, clocks go back 1 hour to 1:00 AM. The offset changes from UTC-03:00 to UTC-04:00.
AT conversion chart
| AT | UTC | In your time zone |
|---|---|---|
| 12:00 AM | 3:00 AM | … |
| 1:00 AM | 4:00 AM | … |
| 2:00 AM | 5:00 AM | … |
| 3:00 AM | 6:00 AM | … |
| 4:00 AM | 7:00 AM | … |
| 5:00 AM | 8:00 AM | … |
| 6:00 AM | 9:00 AM | … |
| 7:00 AM | 10:00 AM | … |
| 8:00 AM | 11:00 AM | … |
| 9:00 AM | 12:00 PM | … |
| 10:00 AM | 1:00 PM | … |
| 11:00 AM | 2:00 PM | … |
| 12:00 PM | 3:00 PM | … |
| 1:00 PM | 4:00 PM | … |
| 2:00 PM | 5:00 PM | … |
| 3:00 PM | 6:00 PM | … |
| 4:00 PM | 7:00 PM | … |
| 5:00 PM | 8:00 PM | … |
| 6:00 PM | 9:00 PM | … |
| 7:00 PM | 10:00 PM | … |
| 8:00 PM | 11:00 PM | … |
| 9:00 PM | 12:00 AM (+1 day) | … |
| 10:00 PM | 1:00 AM (+1 day) | … |
| 11:00 PM | 2:00 AM (+1 day) | … |
Questions about Atlantic Time
What is the UTC offset of Atlantic Time?
Atlantic Time is UTC-03:00 today. It moves between standard and daylight time during the year.
Where do people use AT?
AT covers Halifax, Bermuda, Puerto Rico (no DST).
What is 9 AM AT in UTC?
9:00 AM AT is 12:00 PM UTC.
Convert a time in AT
- 12:00 AM Atlantic Time (AT) in Your Local Time
- 1:00 AM Atlantic Time (AT) in Your Local Time
- 2:00 AM Atlantic Time (AT) in Your Local Time
- 3:00 AM Atlantic Time (AT) in Your Local Time
- 4:00 AM Atlantic Time (AT) in Your Local Time
- 5:00 AM Atlantic Time (AT) in Your Local Time
- 6:00 AM Atlantic Time (AT) in Your Local Time
- 7:00 AM Atlantic Time (AT) in Your Local Time
- 8:00 AM Atlantic Time (AT) in Your Local Time
- 9:00 AM Atlantic Time (AT) in Your Local Time
- 10:00 AM Atlantic Time (AT) in Your Local Time
- 11:00 AM Atlantic Time (AT) in Your Local Time
- 12:00 PM Atlantic Time (AT) in Your Local Time
- 1:00 PM Atlantic Time (AT) in Your Local Time
- 2:00 PM Atlantic Time (AT) in Your Local Time
- 3:00 PM Atlantic Time (AT) in Your Local Time
- 4:00 PM Atlantic Time (AT) in Your Local Time
- 5:00 PM Atlantic Time (AT) in Your Local Time
- 6:00 PM Atlantic Time (AT) in Your Local Time
- 7:00 PM Atlantic Time (AT) in Your Local Time
- 8:00 PM Atlantic Time (AT) in Your Local Time
- 9:00 PM Atlantic Time (AT) in Your Local Time
- 10:00 PM Atlantic Time (AT) in Your Local Time
- 11:00 PM Atlantic Time (AT) in Your Local Time
- 0:00 Atlantic Time (AT) in Your Local Time
- 1:00 Atlantic Time (AT) in Your Local Time
- 2:00 Atlantic Time (AT) in Your Local Time
- 3:00 Atlantic Time (AT) in Your Local Time
- 4:00 Atlantic Time (AT) in Your Local Time
- 5:00 Atlantic Time (AT) in Your Local Time
- 6:00 Atlantic Time (AT) in Your Local Time
- 7:00 Atlantic Time (AT) in Your Local Time
- 8:00 Atlantic Time (AT) in Your Local Time
- 9:00 Atlantic Time (AT) in Your Local Time
- 10:00 Atlantic Time (AT) in Your Local Time
- 11:00 Atlantic Time (AT) in Your Local Time
- 12:00 Atlantic Time (AT) in Your Local Time
- 13:00 Atlantic Time (AT) in Your Local Time
- 14:00 Atlantic Time (AT) in Your Local Time
- 15:00 Atlantic Time (AT) in Your Local Time
- 16:00 Atlantic Time (AT) in Your Local Time
- 17:00 Atlantic Time (AT) in Your Local Time
- 18:00 Atlantic Time (AT) in Your Local Time
- 19:00 Atlantic Time (AT) in Your Local Time
- 20:00 Atlantic Time (AT) in Your Local Time
- 21:00 Atlantic Time (AT) in Your Local Time
- 22:00 Atlantic Time (AT) in Your Local Time
- 23:00 Atlantic Time (AT) in Your Local Time