WAT to AST Converter
AST is 5 hours behind WAT. 9:00 AM WAT = 4:00 AM AST.
AST is 5 hours behind WAT at the moment. To convert WAT to AST, subtract 5 hours from the WAT time: 9:00 AM WAT = 4:00 AM AST.
WAT (West Africa Time) is used in Nigeria, Cameroon, Angola, DR Congo (west). AST (Atlantic Time) is used in Nova Scotia, New Brunswick, PEI; Puerto Rico and the Eastern Caribbean (all year).
AST here is Atlantic Standard Time, not Arabia Standard Time.
WAT to AST time conversion table
WAT to AST on 6 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| WAT | AST | Day |
|---|---|---|
| 12:00 AM WAT | 7:00 PM AST | previous day |
| 1:00 AM WAT | 8:00 PM AST | previous day |
| 2:00 AM WAT | 9:00 PM AST | previous day |
| 3:00 AM WAT | 10:00 PM AST | previous day |
| 4:00 AM WAT | 11:00 PM AST | previous day |
| 5:00 AM WAT | 12:00 AM AST | night |
| 6:00 AM WAT | 1:00 AM AST | night |
| 7:00 AM WAT | 2:00 AM AST | night |
| 8:00 AM WAT | 3:00 AM AST | night |
| 9:00 AM WAT | 4:00 AM AST | night |
| 10:00 AM WAT | 5:00 AM AST | night |
| 11:00 AM WAT | 6:00 AM AST | — |
| 12:00 PM WAT | 7:00 AM AST | — |
| 1:00 PM WAT | 8:00 AM AST | — |
| 2:00 PM WAT | 9:00 AM AST | work hours |
| 3:00 PM WAT | 10:00 AM AST | work hours |
| 4:00 PM WAT | 11:00 AM AST | work hours |
| 5:00 PM WAT | 12:00 PM AST | — |
| 6:00 PM WAT | 1:00 PM AST | — |
| 7:00 PM WAT | 2:00 PM AST | — |
| 8:00 PM WAT | 3:00 PM AST | — |
| 9:00 PM WAT | 4:00 PM AST | — |
| 10:00 PM WAT | 5:00 PM AST | — |
| 11:00 PM WAT | 6:00 PM AST | — |
- Work rows — 9 AM–5 PM in both places
- Night in the destination (10 PM–6 AM)
How to convert WAT to AST
Subtract 5 hours from the WAT time to get AST.
Example: 9:00 AM WAT = 4:00 AM AST.
Across midnight: 1:00 AM WAT = 8:00 PM AST (previous day). The date changes, so always check the day as well as the hour.
Time difference between WAT and AST
The time difference between WAT and AST is not the same all year, because the two sides change for daylight saving time on different dates. In 2026 it works out like this:
- 1 Jan 2026 – 7 Mar 2026: AST is 5 hours behind of WAT.
- 8 Mar 2026 – 31 Oct 2026: AST is 4 hours behind of WAT.
- 1 Nov 2026 – 31 Dec 2026: AST is 5 hours behind of WAT.
WAT and AST during daylight saving time
- WAT does not observe daylight saving time; it stays on UTC+1 all year.
- AST next changes on 14 Mar 2027: clocks go forward one hour at 01:59 local time, from AST (UTC−4) to ADT (UTC−3).
Best time for a meeting between WAT and AST
WAT and AST share 3 hours of the 9 AM–5 PM working day. Any time between 2:00 PM and 5:00 PM WAT lands between 9:00 AM and 12:00 PM AST, inside working hours for both.
WAT to AST FAQ
What is the time difference between WAT and AST?
Right now AST is 5 hours behind WAT. The gap changes 3 times in 2026 because the two sides switch to daylight saving time on different dates.
What is 9 AM WAT in AST?
9:00 AM WAT is 4:00 AM AST.
What is 12 PM (noon) WAT in AST?
12:00 PM WAT is 7:00 AM AST.
Is AST ahead of or behind WAT?
AST is 5 hours behind WAT, so it is earlier in AST than in WAT.
Does WAT change for daylight saving time?
No. WAT stays on the same offset all year, so conversions never shift for daylight saving time.
Does AST change for daylight saving time?
Yes. AST next changes on 14 Mar 2027, when clocks go forward one hour from AST to ADT.
What is the best time for a meeting between WAT and AST?
WAT and AST share 3 hours of the 9 AM–5 PM working day. Any time between 2:00 PM and 5:00 PM WAT lands between 9:00 AM and 12:00 PM AST, inside working hours for both.
Related conversions
Convert AST to WAT
Convert WAT to other time zones
Convert other time zones to AST
Learn more
Updated 6 November 2026. Time zone data: IANA tz database.