Does it handle Daylight Saving Time?

Yes, the tool automatically adjusts for Daylight Saving Time based on the specific date you select, ensuring accurate conversions year-round.

Can I add multiple cities?

Yes, you can add as many cities as you need to the dashboard to compare times across your entire global network simultaneously.

Halifax to AST

-1h

Halifax

ADTSOURCE

Canada · UTC-03:00☀ DST active

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

AST

UTC-03:00☀ DST active

HH11

MM00

11:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Halifax

AST

12:00 AM

2:00 AM

4:00 AM

6:00 AM

8:00 AM

10:00 AM

12:00 PM

2:00 PM

4:00 PM

6:00 PM

8:00 PM

10:00 PM

Green rows indicate typical business hours (9 AM - 5 PM)

ADT and AST on the World Map

The map below highlights the ADT (Atlantic Standard Time) and AST (Atlantic Standard Time) timezone regions across the globe.

ADT Zone

→

AST Zone

Explore all world timezones interactively →

AST – Atlantic Standard Time

UTC-04:00

Atlantic Standard Time (AST) is the time zone for the Canadian Atlantic provinces and the Caribbean, 4 hours behind UTC.

Countries in AST

Canada (Atlantic provinces)Puerto RicoUS Virgin IslandsDominican RepublicVenezuelaBoliviaBarbadosTrinidad and Tobago

Major Cities in AST

HalifaxSan JuanSanto DomingoCaracasLa PazFrederictonCharlottetown

Key Facts about AST

•Puerto Rico uses AST year-round and does not observe DST.
•AST is 1 hour ahead of EST.
•Halifax, the capital of Nova Scotia, is the largest city in AST Canada.

Daylight Saving:Yes – switches to ADT

Learn more about AST on Wikipedia

AST – Atlantic Standard Time

UTC-04:00

Atlantic Standard Time (AST) is the time zone for the Canadian Atlantic provinces and the Caribbean, 4 hours behind UTC.

Countries in AST

Canada (Atlantic provinces)Puerto RicoUS Virgin IslandsDominican RepublicVenezuelaBoliviaBarbadosTrinidad and Tobago

Major Cities in AST

HalifaxSan JuanSanto DomingoCaracasLa PazFrederictonCharlottetown

Key Facts about AST

•Puerto Rico uses AST year-round and does not observe DST.
•AST is 1 hour ahead of EST.
•Halifax, the capital of Nova Scotia, is the largest city in AST Canada.

Daylight Saving:Yes – switches to ADT

Learn more about AST on Wikipedia

About Halifax

Wikipedia

Halifax operates on Atlantic Time (AST/ADT), UTC-4. As Canada's major Atlantic port and closest city to Europe, Halifax bridges North American and European business.

Population:440,000

Metro:465,000

Business Hours:9:00 AM - 5:00 PM AST

Currency:CAD (C$)

Stock Exchange:N/A (Uses TSX)

Key Landmarks

Halifax CitadelPeggy's CoveHalifax WaterfrontCanadian Museum of ImmigrationPublic Gardens

Did You Know?

Halifax harbors the second largest natural ice-free harbor in the world.

Learn more about ADT timezone →

Comparing Time Zones: Halifax and AST

Halifax runs on Atlantic Daylight Time (ADT) at UTC-03:00, currently observing daylight saving time. AST runs on Atlantic Standard Time (AST) at UTC-04:00. That puts Halifax 1 hour behind AST — a difference of -1h at the current offsets.

In practice, when it is 9:00 AM in Halifax it is 8:00 AM in AST. Midnight in Halifax is 11:00 PM in AST.Halifax observes daylight saving time while AST does not, so the gap narrows or widens by an hour part of the year.

Halifax to AST time conversion table

Halifax (ADT)	AST (AST)	Day
12:00 AM	11:00 PM	previous day
6:00 AM	5:00 AM	same day
7:00 AM	6:00 AM	same day
8:00 AM	7:00 AM	same day
9:00 AM	8:00 AM	same day
12:00 PM	11:00 AM	same day
3:00 PM	2:00 PM	same day
5:00 PM	4:00 PM	same day
6:00 PM	5:00 PM	same day
9:00 PM	8:00 PM	same day

Why people convert Halifax to AST time

Scheduling a call from Halifax to AST: a 10:00 AM start in Halifax lands at 9:00 AM in AST, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both Halifax and AST are inside the 9-to-5 working day between 10:00 AM and 5:00 PM ADT time (9:00 AM–4:00 PM AST). That is roughly 7 hours of usable overlap.
Booking travel or deliveries: tracking AST local time against Halifax keeps pickup windows and arrival estimates honest across the -1h offset.

Always state the zone abbreviation, not just the hour. "3:00 PM ADT" is unambiguous; "3 PM" across a -1h gap is not.
Block 10:00 AM–5:00 PM ADT as the recurring meeting window if you work primarily from Halifax and need AST colleagues present.
Halifax: Clocks fall back on Sun, Nov 1, 2026. Re-check this page after that date because the offset changes and so does the -1h gap.

About AST (Atlantic Standard Time)

Atlantic Standard Time (AST) covers Canada's Atlantic provinces (Nova Scotia, New Brunswick, Prince Edward Island, and most of Labrador), as well as several Caribbean nations. Puerto Rico and the US Virgin Islands use AST year-round without daylight saving time. The Canadian provinces switch to Atlantic Daylight Time (ADT) in summer.

About AST (Atlantic Standard Time)

Best time to call between Halifax and AST

Both Halifax and AST sit inside the 9 AM – 5 PM working day between 10:00 AM–5:00 PM ADT, which is 9:00 AM–4:00 PM AST. That gives roughly 7 hours of shared time — the safest window for a live call or meeting.

Business hours overlap

Halifax and AST share 7 hours of working-hours overlap (10:00 AM–5:00 PM ADT), so scheduling a live meeting is straightforward.

Halifax is 1 hour behind AST (ADT UTC-03:00 → AST UTC-04:00). The shared working window is 10:00 AM–5:00 PM ADT. Remember to re-check around daylight-saving transitions.

🕐 Daylight Saving Time Info

Halifax

☀ Currently in DST

Standard: UTC-04:00 · DST: UTC-03:00

Clocks fall back on Sun, Nov 1, 2026

AST

☀ Currently in DST

Standard: UTC-04:00 · DST: UTC-03:00

Clocks fall back on Sun, Nov 1, 2026

Learn More About Time

Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:

⏳

History of Timekeeping

From sundials to atomic clocks - 5000 years of measuring time

🌍

How Time Zones Work

UTC, offsets, and why zones don't follow straight lines

☀️

Daylight Saving Time

DST dates, which countries observe it, and the ongoing debate

Frequently Asked Questions

What is the time difference between Halifax and AST?

Halifax (ADT, UTC-03:00) is 1 hour behind AST (AST, UTC-04:00). The gap is currently -1h.

How do I convert Halifax time to AST time?

Add -1h to Halifax local time. For example, 9:00 AM in Halifax is 8:00 AM in AST.

What time is it in AST right now?

AST uses AST at UTC-04:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -1h offset from Halifax.

What is the best time to call AST from Halifax?

Call between 10:00 AM and 5:00 PM ADT — that maps to 9:00 AM–4:00 PM AST and keeps both parties inside the working day.

Which is behind, Halifax or AST?

Halifax is 1 hour behind AST. When it is 12:00 PM in Halifax it is 11:00 AM in AST.

Do Halifax and AST use different time zones?

Halifax (Canada) uses ADT at UTC-03:00, while AST uses AST at UTC-04:00. They actually share the same IANA zone.

Does daylight saving time affect the Halifax–AST difference?

Yes at the moment: Halifax is on daylight saving time and AST is not, so the -1h gap shifts by an hour when exactly one of them changes clocks.

Which other cities share Halifax's time zone?

ADT also covers Halifax, San Juan, Santo Domingo, Caracas, La Paz, Fredericton, Charlottetown.

Which countries use ADT, Halifax's zone?

ADT is used in Canada (Atlantic provinces), Puerto Rico, US Virgin Islands, Dominican Republic, Venezuela, Bolivia, Barbados, Trinidad and Tobago.

Is there a day difference between Halifax and AST?

Not normally. The -1h gap only pushes the date over the previous day.

What is the time difference between Halifax and AST?

AST is -1h from Halifax.

What timezone is Halifax in?

Halifax operates on Atlantic Time (AST/ADT), UTC-4. As Canada's major Atlantic port and closest city to Europe, Halifax bridges North American and European business.