Halifax to COT
-2hHalifax
ADTSOURCECOT
COTGreen rows indicate typical business hours (9 AM - 5 PM)
ADT and COT on the World Map
The map below highlights the ADT (Atlantic Standard Time) and COT (Colombia Time) timezone regions across the globe.
AST – Atlantic Standard Time
UTC-04:00Atlantic Standard Time (AST) is the time zone for the Canadian Atlantic provinces and the Caribbean, 4 hours behind UTC.
- •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.
COT – Colombia Time
UTC-05:00Colombia Time (COT) is the standard time for Colombia, 5 hours behind UTC.
- •Colombia does not observe daylight saving time.
- •COT is the same offset as EST (UTC-05:00).
- •Bogotá sits at 2,640m elevation, making it one of the highest capital cities.
About Halifax
WikipediaHalifax 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.
Halifax harbors the second largest natural ice-free harbor in the world.
Everything You Need to Know About Halifax and COT Time
Halifax runs on Atlantic Daylight Time (ADT) at UTC-03:00, currently observing daylight saving time. COT runs on Colombia Time (COT) at UTC-05:00. That puts Halifax 2 hours behind COT — a difference of -2h at the current offsets.
In practice, when it is 9:00 AM in Halifax it is 7:00 AM in COT. Midnight in Halifax is 10:00 PM in COT.Halifax observes daylight saving time while COT does not, so the gap narrows or widens by an hour part of the year.
Halifax to COT time conversion table
| Halifax (ADT) | COT (COT) | Day |
|---|---|---|
| 12:00 AM | 10:00 PM | previous day |
| 6:00 AM | 4:00 AM | same day |
| 7:00 AM | 5:00 AM | same day |
| 8:00 AM | 6:00 AM | same day |
| 9:00 AM | 7:00 AM | same day |
| 12:00 PM | 10:00 AM | same day |
| 3:00 PM | 1:00 PM | same day |
| 5:00 PM | 3:00 PM | same day |
| 6:00 PM | 4:00 PM | same day |
| 9:00 PM | 7:00 PM | same day |
Why people convert Halifax to COT time
- Scheduling a call from Halifax to COT: a 10:00 AM start in Halifax lands at 8:00 AM in COT, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Halifax and COT are inside the 9-to-5 working day between 11:00 AM and 5:00 PM ADT time (9:00 AM–3:00 PM COT). That is roughly 6 hours of usable overlap.
- Watching a live event or market open: Halifax viewers need 7:00 AM in COT to catch a 9:00 AM start there, and 2:00 AM if the event is anchored to Halifax.
- Always state the zone abbreviation, not just the hour. "3:00 PM ADT" is unambiguous; "3 PM" across a -2h gap is not.
- Block 11:00 AM–5:00 PM ADT as the recurring meeting window if you work primarily from Halifax and need COT 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 -2h 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 COT (Colombia Time)
Colombia Time (COT) is used throughout Colombia. Colombia does not observe daylight saving time. COT shares the same offset as EST (UTC-05:00). Bogotá, the capital, is one of the largest cities in South America.
Best time to call between Halifax and COT
Both Halifax and COT sit inside the 9 AM – 5 PM working day between 11:00 AM–5:00 PM ADT, which is 9:00 AM–3:00 PM COT. That gives roughly 6 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
Halifax and COT share 6 hours of working-hours overlap (11:00 AM–5:00 PM ADT), so scheduling a live meeting is straightforward.
Halifax is 2 hours behind COT (ADT UTC-03:00 → COT UTC-05:00). The shared working window is 11:00 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
COT
Does not observe DST
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between Halifax and COT?
Halifax (ADT, UTC-03:00) is 2 hours behind COT (COT, UTC-05:00). The gap is currently -2h.
How do I convert Halifax time to COT time?
Add -2h to Halifax local time. For example, 9:00 AM in Halifax is 7:00 AM in COT.
What time is it in COT right now?
COT uses COT at UTC-05:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -2h offset from Halifax.
What is the best time to call COT from Halifax?
Call between 11:00 AM and 5:00 PM ADT — that maps to 9:00 AM–3:00 PM COT and keeps both parties inside the working day.
Which is behind, Halifax or COT?
Halifax is 2 hours behind COT. When it is 12:00 PM in Halifax it is 10:00 AM in COT.
Do Halifax and COT use different time zones?
Halifax (Canada) uses ADT at UTC-03:00, while COT uses COT at UTC-05:00. The IANA identifiers are America/Halifax and America/Bogota.
Does daylight saving time affect the Halifax–COT difference?
Yes at the moment: Halifax is on daylight saving time and COT is not, so the -2h 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 COT?
Not normally. The -2h gap only pushes the date over the previous day.
What is the time difference between Halifax and COT?
COT is -2h 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.
What timezone is COT in?
COT operates on its local timezone.
What are the business hours in Halifax?
Standard business hours in Halifax are 9:00 AM - 5:00 PM AST.
Which countries use AST (Atlantic Standard Time)?
AST is used in Canada (Atlantic provinces), Puerto Rico, US Virgin Islands, Dominican Republic, Venezuela, Bolivia, and 2 more countries.
Does AST observe daylight saving time?
Yes, AST switches to ADT during summer months.
What are some interesting facts about AST?
Puerto Rico uses AST year-round and does not observe DST. AST is 1 hour ahead of EST.
Which cities are in the COT timezone?
Major cities in the COT timezone include Bogotá, Medellín, Cali, Barranquilla, Cartagena.
What is the UTC offset for COT?
Colombia Time (COT) is at UTC-05:00.
What should I know about the COT timezone?
Colombia does not observe daylight saving time. COT is the same offset as EST (UTC-05:00).
When is it midnight in Halifax, what time is it in COT?
When it is 12:00 AM (midnight) in Halifax (AST), it is -2h later in COT (COT).
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