CAT to Halifax
-5hCAT
CATSOURCEHalifax
ADTGreen rows indicate typical business hours (9 AM - 5 PM)
CAT and ADT on the World Map
The map below highlights the CAT (Central Africa Time) and ADT (Atlantic Standard Time) timezone regions across the globe.
CAT – Central Africa Time
UTC+02:00Central Africa Time (CAT, UTC+02:00) covers Zimbabwe, Zambia, Mozambique, Malawi and neighbouring countries.
- •Central Africa Time is fixed at UTC+02:00 with no daylight saving.
- •CAT matches South Africa Standard Time (SAST) all year.
- •It is the same offset as Central European Time in winter.
- •Harare is level with Johannesburg and one hour ahead of Lagos.
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.
Comparing Time Zones: CAT and Halifax
CAT runs on Central Africa Time (CAT) at UTC+02:00. Halifax runs on Atlantic Daylight Time (ADT) at UTC-03:00, also currently on daylight saving time. That puts CAT 5 hours behind Halifax — a difference of -5h at the current offsets.
In practice, when it is 9:00 AM in CAT it is 4:00 AM in Halifax. Midnight in CAT is 7:00 PM in Halifax.Halifax observes daylight saving time while CAT does not, so the gap narrows or widens by an hour part of the year.
CAT to Halifax time conversion table
| CAT (CAT) | Halifax (ADT) | Day |
|---|---|---|
| 12:00 AM | 7:00 PM | previous day |
| 6:00 AM | 1:00 AM | same day |
| 7:00 AM | 2:00 AM | same day |
| 8:00 AM | 3:00 AM | same day |
| 9:00 AM | 4:00 AM | same day |
| 12:00 PM | 7:00 AM | same day |
| 3:00 PM | 10:00 AM | same day |
| 5:00 PM | 12:00 PM | same day |
| 6:00 PM | 1:00 PM | same day |
| 9:00 PM | 4:00 PM | same day |
Why people convert CAT to Halifax time
- Scheduling a call from CAT to Halifax: a 10:00 AM start in CAT lands at 5:00 AM in Halifax, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both CAT and Halifax are inside the 9-to-5 working day between 2:00 PM and 5:00 PM CAT time (9:00 AM–12:00 PM ADT). That is roughly 3 hours of usable overlap.
- Watching a live event or market open: CAT viewers need 4:00 AM in Halifax to catch a 9:00 AM start there, and 5:00 AM if the event is anchored to CAT.
- Always state the zone abbreviation, not just the hour. "3:00 PM CAT" is unambiguous; "3 PM" across a -5h gap is not.
- Block 2:00 PM–5:00 PM CAT as the recurring meeting window if you work primarily from CAT 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 CAT (Central Africa Time)
Central Africa Time (CAT) is fixed at UTC+02:00 all year across a broad belt of southern and central Africa, including Zimbabwe, Zambia, Mozambique, Malawi, Rwanda, Burundi and the eastern Democratic Republic of the Congo. None of these countries observes daylight saving time, so CAT never shifts. It is the same offset as South Africa Standard Time (SAST) and the winter version of Central European Time, which makes CAT a convenient bridge between African, European and Middle Eastern schedules — Harare is level with Johannesburg all year and one hour ahead of Lagos.
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 CAT and Halifax
Both CAT and Halifax sit inside the 9 AM – 5 PM working day between 2:00 PM–5:00 PM CAT, which is 9:00 AM–12:00 PM ADT. That gives roughly 3 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
CAT and Halifax overlap for about 3 hours during the working day — enough for meetings if you avoid the edges of the window.
CAT is 5 hours behind Halifax (CAT UTC+02:00 → ADT UTC-03:00). The shared working window is 2:00 PM–5:00 PM CAT. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
CAT
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 CAT and Halifax?
CAT (CAT, UTC+02:00) is 5 hours behind Halifax (ADT, UTC-03:00). The gap is currently -5h.
How do I convert CAT time to Halifax time?
Add -5h to CAT local time. For example, 9:00 AM in CAT is 4:00 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 -5h offset from CAT.
What is the best time to call Halifax from CAT?
Call between 2:00 PM and 5:00 PM CAT — that maps to 9:00 AM–12:00 PM ADT and keeps both parties inside the working day.
Which is behind, CAT or Halifax?
CAT is 5 hours behind Halifax. When it is 12:00 PM in CAT it is 7:00 AM in Halifax.
Do CAT and Halifax use different time zones?
CAT uses CAT at UTC+02:00, while Halifax (Canada) uses ADT at UTC-03:00. The IANA identifiers are Africa/Harare and America/Halifax.
Does daylight saving time affect the CAT–Halifax difference?
Yes at the moment: Halifax is on daylight saving time and CAT is not, so the -5h gap shifts by an hour when exactly one of them changes clocks.
Which other cities share CAT's time zone?
CAT also covers Harare, Lusaka, Maputo, Lilongwe, Kigali.
Which countries use CAT, CAT's zone?
CAT is used in Zimbabwe, Zambia, Mozambique, Malawi, Rwanda, Burundi, DR Congo (east).
Is there a day difference between CAT and Halifax?
Not normally. The -5h gap only pushes the date over the previous day.
What is the time difference between CAT and Halifax?
Halifax is -5h from CAT.
What timezone is CAT in?
CAT 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 CAT (Central Africa Time)?
CAT is used in Zimbabwe, Zambia, Mozambique, Malawi, Rwanda, Burundi, and 1 more countries.
Does CAT observe daylight saving time?
No, CAT does not observe daylight saving time and remains at UTC+02:00 year-round.
What are some interesting facts about CAT?
Central Africa Time is fixed at UTC+02:00 with no daylight saving. CAT matches South Africa Standard Time (SAST) all year.
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 CAT, what time is it in Halifax?
When it is 12:00 AM (midnight) in CAT (CAT), it is -5h later in Halifax (AST).
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