WAT to ADT: WAT is 4 hours ahead of ADT
West Africa Time is 4 hours ahead of Atlantic Time right now. It is 10:17 pm WAT in West Africa and 6:17 pm ADT in Atlantic.
Convert a specific time from WAT to ADT
Pick any time and date to convert it both ways. The conversion runs in your browser against the real zone rules, so a date inside a daylight saving period gets that period's offset rather than today's.
What is the time difference between WAT and ADT?
Atlantic Time is 4 hours behind West Africa Time. To go from WAT to ADT you subtract 4 hours. That gap is not fixed. Across 2026 the distance between these two zones takes 2 different values, from 4 hours to 5 hours, because Atlantic moves its clocks and West Africa does not. This page recomputes it rather than assuming.
WAT to ADT conversion table
Every hour of Saturday, September 26, 2026 in West Africa, with the matching reading in Atlantic. 4 of the 24 hours land on a different calendar date in Atlantic, which is the part people get wrong when they schedule across this pair.
| WAT | WAT 24h | ADT | ADT 24h | Date |
|---|---|---|---|---|
| 12:00 am | 00:00 | 8:00 pm | 20:00 | the previous day |
| 1:00 am | 01:00 | 9:00 pm | 21:00 | the previous day |
| 2:00 am | 02:00 | 10:00 pm | 22:00 | the previous day |
| 3:00 am | 03:00 | 11:00 pm | 23:00 | the previous day |
| 4:00 am | 04:00 | 12:00 am | 00:00 | same day |
| 5:00 am | 05:00 | 1:00 am | 01:00 | same day |
| 6:00 am | 06:00 | 2:00 am | 02:00 | same day |
| 7:00 am | 07:00 | 3:00 am | 03:00 | same day |
| 8:00 am | 08:00 | 4:00 am | 04:00 | same day |
| 9:00 am | 09:00 | 5:00 am | 05:00 | same day |
| 10:00 am | 10:00 | 6:00 am | 06:00 | same day |
| 11:00 am | 11:00 | 7:00 am | 07:00 | same day |
| 12:00 pm | 12:00 | 8:00 am | 08:00 | same day |
| 1:00 pm | 13:00 | 9:00 am | 09:00 | same day |
| 2:00 pm | 14:00 | 10:00 am | 10:00 | same day |
| 3:00 pm | 15:00 | 11:00 am | 11:00 | same day |
| 4:00 pm | 16:00 | 12:00 pm | 12:00 | same day |
| 5:00 pm | 17:00 | 1:00 pm | 13:00 | same day |
| 6:00 pm | 18:00 | 2:00 pm | 14:00 | same day |
| 7:00 pm | 19:00 | 3:00 pm | 15:00 | same day |
| 8:00 pm | 20:00 | 4:00 pm | 16:00 | same day |
| 9:00 pm | 21:00 | 5:00 pm | 17:00 | same day |
| 10:00 pm | 22:00 | 6:00 pm | 18:00 | same day |
| 11:00 pm | 23:00 | 7:00 pm | 19:00 | same day |
What are the best hours to schedule a call between WAT and ADT?
4 hours of the standard 9:00 am to 5:00 pm working day line up in both zones, from 1:00 pm WAT to 5:00 pm WAT. In Atlantic that window reads 9:00 am to 1:00 pm. Outside it, one side is either not yet at their desk or already gone.
| WAT | ADT | Working hours | Note |
|---|---|---|---|
| 1:00 pm | 9:00 am | both sides | afternoon in West Africa, mid morning in Atlantic |
| 2:00 pm | 10:00 am | both sides | afternoon in West Africa, mid morning in Atlantic |
| 3:00 pm | 11:00 am | both sides | afternoon in West Africa, mid morning in Atlantic |
| 4:00 pm | 12:00 pm | both sides | afternoon in West Africa, noon in Atlantic |
Does daylight saving change WAT to ADT?
West Africa Time does not move its clocks at all, so its UTC+1 offset holds every day of the year.
Atlantic Time is currently on ADT and changes next on Sunday, November 1, 2026, when the clock falls back from 1:59 am to 1:00 am and the offset moves from UTC-3 to UTC-4.
Because the two sides do not move together, the answer to this conversion changes during the year. For part of the year the gap is 4 hours and for the rest it is 5 hours. The table above is built for today, not for an average day.
Is WAT ahead of or behind ADT?
WAT is ahead of ADT by 4 hours: when it is 12:00 pm in West Africa, it is 8:00 am in Atlantic. One wrinkle worth knowing: AST and ADT are two names for the same zone, not two zones. Atlantic Time reads AST in winter and ADT in summer. When somebody types "wat to ast" they nearly always mean the zone rather than the literal winter offset, so this page resolves WAT to Africa/Lagos and AST to America/Halifax and applies whichever offset is genuinely in force on the day.
West Africa Time covers Lagos, Kinshasa, Luanda and Douala, the most populous zone in Africa. Atlantic Time covers Halifax, Moncton and the Canadian Maritimes. The identifiers behind them are Africa/Lagos and America/Halifax, which is what any calendar or scheduling system should be storing rather than a fixed number of hours.
Questions
- What is WAT in ADT?
- WAT is 4 hours ahead of ADT. 9:00 am WAT is 5:00 am ADT.
- How many hours ahead is ADT of WAT?
- ADT is 4 hours behind WAT. That varies across the year, between 4 hours and 5 hours.
- What time is it in Atlantic right now?
- 6:17 pm ADT on Saturday, September 26, 2026.
- When can West Africa and Atlantic meet during working hours?
- Between 1:00 pm and 5:00 pm WAT, which is 9:00 am to 1:00 pm ADT.
- Does this account for daylight saving?
- Yes. Every reading is computed from the IANA database for the actual date, so WAT and ADT are the abbreviations genuinely in force today rather than a fixed assumption.
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