MSTTime.nowMountain Standard Time

ADT Time Now

15:19:40

Thursday, October 1, 2026

Time zone: Atlantic Daylight Time (ADT)
UTC offset: UTC−3
Daylight saving: In effect
Next clock change: Sun 1 Nov 2026
Sunrise / sunset: 07:10 / 18:57

ADT is in use right now in Atlantic Time (UTC−3).

ADT is 3 hours ahead of MDT (Mountain Standard Time).

ADT time zone

Atlantic Time

Atlantic Daylight Time (ADT)

IANA: America/Halifax · UTC−3

Daylight saving time in ADT

In effect now

Next change: Sun 1 Nov, clocks go back 1 hour (02:00 → 01:00)

Sunrise and sunset in ADT today

Sunrise 07:10 · Sunset 18:57

Daylight 11h 47m · Solar noon 13:03

What time zone is ADT in?

Clocks in ADT run on Atlantic Time (ADT, UTC−3); software knows the zone as America/Halifax.

Does ADT observe daylight saving time?

Yes. ADT is on daylight saving time now. The next changes:

Sunday 1 November 2026: clocks go back at 02:00 to 01:00 (ADT → AST)
Sunday 14 March 2027: clocks go forward at 02:00 to 03:00 (AST → ADT)
Sunday 7 November 2027: clocks go back at 02:00 to 01:00 (ADT → AST)

Time in ADT vs major world cities

City	Local time	Difference from ADT
New York	14:19 Thu	1 hour behind
Los Angeles	11:19 Thu	4 hours behind
London	19:19 Thu	4 hours ahead
Paris	20:19 Thu	5 hours ahead
Dubai	22:19 Thu	7 hours ahead
Mumbai	23:49 Thu	8.5 hours ahead
Singapore	02:19 Fri	11 hours ahead
Tokyo	03:19 Fri	12 hours ahead
Sydney	04:19 Fri	13 hours ahead
Johannesburg	20:19 Thu	5 hours ahead
São Paulo	15:19 Thu	same time
Chicago	13:19 Thu	2 hours behind

October 2026 calendar for ADT

Frequently asked questions about ADT

What time zone is ADT in?

Atlantic Time (ADT), UTC−3; IANA zone America/Halifax.

When do the clocks change in ADT?

Next on Sunday 1 November 2026, when clocks go back from 02:00 to 01:00.