Current Time in ADT
Atlantic Daylight Time
About ADT Atlantic Daylight Time
The daylight saving time observed in the Atlantic Time Zone of North America. It is used by parts of eastern Canada (Nova Scotia, New Brunswick, Prince Edward Island) and some Caribbean islands during their summer months. It is one hour ahead of Atlantic Standard Time (AST).
UTC Offset: -03:00
ADT at a glance
| Right now | 18:37 on Tuesday |
|---|---|
| UTC offset | UTC-03:00 (3 hours behind UTC) |
| Full name | Atlantic Daylight Time |
| Countries | 3 |
| IANA zones | 7 |
What is ADT?
ADT is a time zone that is currently UTC-03:00 - that's 3 hours behind UTC. Its full name is Atlantic Daylight Time. Right now the local time on ADT is 18:37. Today 3 countries (including Bermuda, Canada and Greenland) and 7 IANA database zones sit at this offset, which is why ADT is a useful shorthand even though the exact local rules differ from place to place.
How to convert ADT to UTC
For quick planning, use today's offset as a rule of thumb: 12:00 UTC = 09:00 local time, and 09:00 local time = 12:00 UTC. The live clock above is the safest reference when daylight saving or regional rules may apply.
Which countries use ADT?
ADT is used across Bermuda, Canada and Greenland. Open a country to see all of its cities and their local time.
IANA time zones in ADT
ADT maps to the IANA database zones America/Glace_Bay, America/Goose_Bay, America/Halifax, America/Moncton, America/Thule and Atlantic/Bermuda, among 7 in total. Each zone page shows its exact rules, including any daylight saving changes.
💡 Tip: Comparing times? ADT is 3 hours behind UTC. Use the IANA links and country links on this page when you need the exact local rule for a real place, not just the offset.
ADT - Frequently asked questions
What is ADT?
ADT is a time zone currently UTC-03:00 (3 hours behind UTC). Its full name is Atlantic Daylight Time.
What is the UTC offset of ADT?
ADT is UTC-03:00 right now - 3 hours behind UTC.
Which countries are on ADT?
ADT is used in Bermuda, Canada and Greenland.
What time is it in ADT now?
The current time on ADT is 18:37 on Tuesday. The clock above updates every second.
How Alarm.now explains ADT
Abbreviation, offset, and IANA zones
ADT is shown as a time-zone group for Atlantic Daylight Time with offset -03:00. The page links the abbreviation to the IANA zones and countries that use it, so users and search engines can distinguish a short label from an exact time-zone rule set.
When to use a specific IANA page
Use this group page for an overview of the abbreviation and offset. Use a linked IANA time-zone page when you need exact daylight-saving rules for a calendar, app, or future-date comparison.