ADT Time Now: Atlantic Daylight Time

ADT (Atlantic Daylight Time) is a fixed offset of UTC−3: it never changes for daylight saving.

Live •Updates every second
UTC−3 Thursday, August 6, 2026
18:33:57

Compare with

It is in ADT (Atlantic Daylight Time, UTC−3) right now. ADT (Atlantic Daylight Time) is a fixed offset of UTC−3: it never changes for daylight saving.
Daylight saving

Is it AST or ADT right now?

ADT (UTC−3) is in effect right now. Clocks fall back to AST (UTC−4) on November 1, 2026, in 86 days.
Mar 8Nov 1
ADT · daylight (UTC−3) AST · standard (UTC−4) Today
Clock changes

AST / ADT daylight-saving dates

2026

↑ Forward Sunday, March 8 → ADT
↓ Back Sunday, November 1 → AST

2027

↑ Forward Sunday, March 14 → ADT
↓ Back Sunday, November 7 → AST

Clocks change at 2:00 AM local time. Dates shift by a week or so each year; these are computed live from our weekly-updated database of 160,000 locations and time zones.

What the letters mean

AST, ADT and Atlantic Time

Standard time (winter)
AST, Atlantic Standard Time
UTC−4
Daylight time (summer)
ADT, Atlantic Daylight Time
UTC−3
When you're not sure
Write Atlantic Time: it refers to whichever of AST or ADT is currently in effect, so it's always correct.
Time differences

ADT vs other time zones right now

UTC Coordinated Universal Time +3h → GMT Greenwich Mean Time +3h → EST Eastern Standard Time −2h → PST Pacific Standard Time −5h → CST Central Standard Time −3h → CET Central European Time +4h → IST India Standard Time +8:30 → SGT Singapore Time +11h →

Tap a row for the full conversion page with a 24-hour table and the best hours to schedule across both zones.

Reference

About ADT

Full name
Atlantic Daylight Time
UTC offset
UTC−3
Type
Daylight-saving variant (fixed offset)
Standard counterpart
AST, Atlantic Standard Time
Where it is used
Atlantic Canada from mid-March to early November.

ADT is the daylight-saving counterpart of AST (UTC−4).

Cities on ADT right now

Halifax Dartmouth Charlottetown Lower Sackville Cole Harbour New Glasgow Summerside Kentville Truro Cap-aux-Meules Fall River Stratford

Convert ADT to other time zones

ADT → UTC ADT → GMT ADT → EST ADT → PST ADT → CST ADT → CET ADT → IST ADT → SGT

Convert ADT to major cities

ADT → New York ADT → London ADT → Tokyo ADT → Sydney ADT → Los Angeles ADT → Dubai ADT → Singapore ADT → Mumbai

Frequently asked questions

What does ADT stand for?

ADT stands for Atlantic Daylight Time, a UTC offset of UTC−3.

Is AST the same as ADT?

No. AST (UTC−4) is standard (winter) time; ADT (UTC−3) is daylight (summer) time, one hour ahead. The umbrella term “Atlantic Time” refers to whichever is in effect, so it is always safe to write Atlantic Time when you are unsure.

When do the clocks change for ADT?

In 2026, clocks go forward into ADT on Sunday, March 8 and back into AST on Sunday, November 1. The dates shift by a week or so each year; this page always shows the live, correct schedule.

What time is it in ADT right now?

It is currently 6:33 PM on Thursday, August 6, 2026 in ADT (UTC−3).

Where is ADT used?

Atlantic Canada from mid-March to early November. Cities currently on this time include Halifax, Dartmouth, Charlottetown, Lower Sackville, Cole Harbour.

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