AST to WAT
+5hAST
ASTSOURCEWAT
WATGreen rows indicate typical business hours (9 AM - 5 PM)
AST and WAT on the World Map
The map below highlights the AST (Atlantic Standard Time) and WAT (West Africa 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.
WAT – West Africa Time
UTC+01:00West Africa Time (WAT) is the time zone for West and Central Africa, 1 hour ahead of UTC.
- •Lagos, Nigeria is the most populous city in Africa.
- •WAT is the same offset as CET (UTC+01:00).
- •Nigeria does not observe daylight saving time.
Time Conversion Guide: AST to WAT
AST runs on Atlantic Standard Time (AST) at UTC-04:00. WAT runs on West Africa Time (WAT) at UTC+01:00. That puts AST 5 hours ahead of WAT — a difference of +5h at the current offsets.
In practice, when it is 9:00 AM in AST it is 2:00 PM in WAT. Midnight in AST is 5:00 AM in WAT. Neither zone observes daylight saving time, so the offset between them stays constant all year.
AST to WAT time conversion table
| AST (AST) | WAT (WAT) | Day |
|---|---|---|
| 12:00 AM | 5:00 AM | same day |
| 6:00 AM | 11:00 AM | same day |
| 7:00 AM | 12:00 PM | same day |
| 8:00 AM | 1:00 PM | same day |
| 9:00 AM | 2:00 PM | same day |
| 12:00 PM | 5:00 PM | same day |
| 3:00 PM | 8:00 PM | same day |
| 5:00 PM | 10:00 PM | same day |
| 6:00 PM | 11:00 PM | same day |
| 9:00 PM | 2:00 AM | next day |
Why people convert AST to WAT time
- Scheduling a call from AST to WAT: a 10:00 AM start in AST lands at 3:00 PM in WAT, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both AST and WAT are inside the 9-to-5 working day between 9:00 AM and 12:00 PM AST time (2:00 PM–5:00 PM WAT). That is roughly 3 hours of usable overlap.
- Watching a live event or market open: AST viewers need 2:00 PM in WAT to catch a 9:00 AM start there, and 7:00 PM if the event is anchored to AST.
- Always state the zone abbreviation, not just the hour. "3:00 PM AST" is unambiguous; "3 PM" across a +5h gap is not.
- Block 9:00 AM–12:00 PM AST as the recurring meeting window if you work primarily from AST and need WAT colleagues present.
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 WAT (West Africa Time)
West Africa Time (WAT) is used across much of West and Central Africa, including Nigeria, the most populous country in Africa. WAT does not observe daylight saving time and shares the same offset as Central European Time (CET).
Best time to call between AST and WAT
Both AST and WAT sit inside the 9 AM – 5 PM working day between 9:00 AM–12:00 PM AST, which is 2:00 PM–5:00 PM WAT. That gives roughly 3 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
AST and WAT overlap for about 3 hours during the working day — enough for meetings if you avoid the edges of the window.
AST is 5 hours ahead of WAT (AST UTC-04:00 → WAT UTC+01:00). The shared working window is 9:00 AM–12:00 PM AST. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
AST
☀ Currently in DST
Standard: UTC-04:00 · DST: UTC-03:00
Clocks fall back on Sun, Nov 1, 2026
WAT
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 AST and WAT?
AST (AST, UTC-04:00) is 5 hours ahead of WAT (WAT, UTC+01:00). The gap is currently +5h.
How do I convert AST time to WAT time?
Add +5h to AST local time. For example, 9:00 AM in AST is 2:00 PM in WAT.
What time is it in WAT right now?
WAT uses WAT at UTC+01:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +5h offset from AST.
What is the best time to call WAT from AST?
Call between 9:00 AM and 12:00 PM AST — that maps to 2:00 PM–5:00 PM WAT and keeps both parties inside the working day.
Which is ahead, AST or WAT?
AST is 5 hours ahead of WAT. When it is 12:00 PM in AST it is 5:00 PM in WAT.
Does daylight saving time affect the AST–WAT difference?
Neither zone observes daylight saving time, so the +5h offset between AST and WAT is fixed all year.
Which other cities share AST's time zone?
AST also covers Halifax, San Juan, Santo Domingo, Caracas, La Paz, Fredericton, Charlottetown.
Which countries use AST, AST's zone?
AST 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 AST and WAT?
Not normally. The +5h gap only pushes the date over for late-evening times.
What is the time difference between AST and WAT?
WAT is +5h from AST.
What timezone is AST in?
AST operates on its local timezone.
What timezone is WAT in?
WAT operates on its local timezone.
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 WAT timezone?
Major cities in the WAT timezone include Lagos, Abuja, Douala, Yaoundé, Luanda, Kinshasa, Brazzaville.
What is the UTC offset for WAT?
West Africa Time (WAT) is at UTC+01:00.
What should I know about the WAT timezone?
Lagos, Nigeria is the most populous city in Africa. WAT is the same offset as CET (UTC+01:00).
When is it midnight in AST, what time is it in WAT?
When it is 12:00 AM (midnight) in AST (AST), it is +5h later in WAT (WAT).
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See every conversion from AST →·See every conversion from WAT →