COT to Halifax
+2hCOT
COTSOURCEHalifax
ADTGreen rows indicate typical business hours (9 AM - 5 PM)
COT and ADT on the World Map
The map below highlights the COT (Colombia Time) and ADT (Atlantic Standard Time) timezone regions across the globe.
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.
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.
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 COT and Halifax Time
COT runs on Colombia Time (COT) at UTC-05:00. Halifax runs on Atlantic Daylight Time (ADT) at UTC-03:00, also currently on daylight saving time. That puts COT 2 hours ahead of Halifax — a difference of +2h at the current offsets.
In practice, when it is 9:00 AM in COT it is 11:00 AM in Halifax. Midnight in COT is 2:00 AM in Halifax.Halifax observes daylight saving time while COT does not, so the gap narrows or widens by an hour part of the year.
COT to Halifax time conversion table
| COT (COT) | Halifax (ADT) | Day |
|---|---|---|
| 12:00 AM | 2:00 AM | same day |
| 6:00 AM | 8:00 AM | same day |
| 7:00 AM | 9:00 AM | same day |
| 8:00 AM | 10:00 AM | same day |
| 9:00 AM | 11:00 AM | same day |
| 12:00 PM | 2:00 PM | same day |
| 3:00 PM | 5:00 PM | same day |
| 5:00 PM | 7:00 PM | same day |
| 6:00 PM | 8:00 PM | same day |
| 9:00 PM | 11:00 PM | same day |
Why people convert COT to Halifax time
- Scheduling a call from COT to Halifax: a 10:00 AM start in COT lands at 12:00 PM in Halifax, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both COT and Halifax are inside the 9-to-5 working day between 9:00 AM and 3:00 PM COT time (11:00 AM–5:00 PM ADT). That is roughly 6 hours of usable overlap.
- Booking travel or deliveries: tracking Halifax local time against COT keeps pickup windows and arrival estimates honest across the +2h offset.
- Always state the zone abbreviation, not just the hour. "3:00 PM COT" is unambiguous; "3 PM" across a +2h gap is not.
- Block 9:00 AM–3:00 PM COT as the recurring meeting window if you work primarily from COT and need Halifax colleagues present.
- Halifax: Clocks fall back on Sun, Nov 1, 2026. Any meeting series spanning that date will shift by an hour in local time.
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.
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.
Best time to call between COT and Halifax
Both COT and Halifax sit inside the 9 AM – 5 PM working day between 9:00 AM–3:00 PM COT, which is 11:00 AM–5:00 PM ADT. That gives roughly 6 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
COT and Halifax share 6 hours of working-hours overlap (9:00 AM–3:00 PM COT), so scheduling a live meeting is straightforward.
COT is 2 hours ahead of Halifax (COT UTC-05:00 → ADT UTC-03:00). The shared working window is 9:00 AM–3:00 PM COT. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
COT
Does not observe DST
Halifax
☀ 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:
Frequently Asked Questions
What is the time difference between COT and Halifax?
COT (COT, UTC-05:00) is 2 hours ahead of Halifax (ADT, UTC-03:00). The gap is currently +2h.
How do I convert COT time to Halifax time?
Add +2h to COT local time. For example, 9:00 AM in COT is 11:00 AM in Halifax.
What time is it in Halifax right now?
Halifax uses ADT at UTC-03:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +2h offset from COT.
What is the best time to call Halifax from COT?
Call between 9:00 AM and 3:00 PM COT — that maps to 11:00 AM–5:00 PM ADT and keeps both parties inside the working day.
Which is ahead, COT or Halifax?
COT is 2 hours ahead of Halifax. When it is 12:00 PM in COT it is 2:00 PM in Halifax.
Do COT and Halifax use different time zones?
COT uses COT at UTC-05:00, while Halifax (Canada) uses ADT at UTC-03:00. The IANA identifiers are America/Bogota and America/Halifax.
Does daylight saving time affect the COT–Halifax 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 COT's time zone?
COT also covers Bogotá, Medellín, Cali, Barranquilla, Cartagena.
Which countries use COT, COT's zone?
COT is used in Colombia.
Is there a day difference between COT and Halifax?
Not normally. The +2h gap only pushes the date over for late-evening times.
What is the time difference between COT and Halifax?
Halifax is +2h from COT.
What timezone is COT in?
COT operates on its local timezone.
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 are the business hours in Halifax?
Standard business hours in Halifax are 9:00 AM - 5:00 PM AST.
Which countries use COT (Colombia Time)?
COT is used in Colombia.
Does COT observe daylight saving time?
No, COT does not observe daylight saving time and remains at UTC-05:00 year-round.
What are some interesting facts about COT?
Colombia does not observe daylight saving time. COT is the same offset as EST (UTC-05:00).
Which cities are in the AST timezone?
Major cities in the AST timezone include Halifax, San Juan, Santo Domingo, Caracas, La Paz, Fredericton, Charlottetown.
What is the UTC offset for AST?
Atlantic Standard Time (AST) is at UTC-04:00. During daylight saving time, it shifts to ADT.
What should I know about the AST timezone?
Puerto Rico uses AST year-round and does not observe DST. AST is 1 hour ahead of EST.
When is it midnight in COT, what time is it in Halifax?
When it is 12:00 AM (midnight) in COT (COT), it is +2h later in Halifax (AST).
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