World Timezones

AST-ATLANTIC to WAT Converter

Compare WAT to AST-ATLANTIC instead
Atlantic Time1:35 amFri, Jun 5
Atlantic TimeADT
North America · UTC-3
1:35 amFri, Jun 5
12a
1a
2a
3a
4a
5a
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
7p
8p
9p
10p
11p
West Africa TimeWAT
Africa · UTC+1
5:35 amFri, Jun 5
4a
5a
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
7p
8p
9p
10p
11p
12a
1a
2a
3a

Offset

The time difference between Atlantic Time and West Africa Time is 4 hours.

4 hours

Atlantic Time (ADT) is behind West Africa Time (WAT).

ADT: UTC-3

WAT: UTC+1

Atlantic Time is currently observing daylight saving time; West Africa Time is not.

When to schedule

Business-hours overlap: 9 AM–1 PM in Atlantic Time (1 PM–5 PM in West Africa Time).

Both teams are in working hours during this window on weekdays.

Suggested time: 11:00 AM Atlantic Time (3:00 PM West Africa Time).

This window may shift by an hour during daylight saving time.

Public holidays in 2026

National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.

Canada

  • New Year's DayThu, Jan 1
  • Good FridayFri, Apr 3
  • Victoria DayMon, May 18
  • Canada DayWed, Jul 1
  • Labour DayMon, Sep 7
  • National Day for Truth and ReconciliationWed, Sep 30
  • ThanksgivingMon, Oct 12
  • Christmas DayFri, Dec 25

Nigeria

  • New Year's DayThu, Jan 1
  • Good FridayFri, Apr 3
  • Easter MondayMon, Apr 6
  • Workers' DayFri, May 1
  • Children's DayWed, May 27
  • Democracy DayFri, Jun 12
  • National DayThu, Oct 1
  • National Youth DaySun, Nov 1
  • Christmas DayFri, Dec 25
  • Boxing DayMon, Dec 28

About these zones

Atlantic Time is also known as AST, or ADT. To call Canada, dial +1.

West Africa Time is also known as WAT. To call Nigeria, dial +234.

West Africa Time is approximately 4,800 miles east of Atlantic Time.

Quick reference

Full 24-hour conversion table — tap any time to open it in the converter.

AST-ATLANTICWATDay
12:00 am4:00 amSame day
1:00 am5:00 amSame day
2:00 am6:00 amSame day
3:00 am7:00 amSame day
4:00 am8:00 amSame day
5:00 am9:00 amSame day
6:00 am10:00 amSame day
7:00 am11:00 amSame day
8:00 am12:00 pmSame day
9:00 am1:00 pmSame day
10:00 am2:00 pmSame day
11:00 am3:00 pmSame day
12:00 pm4:00 pmSame day
1:00 pm5:00 pmSame day
2:00 pm6:00 pmSame day
3:00 pm7:00 pmSame day
4:00 pm8:00 pmSame day
5:00 pm9:00 pmSame day
6:00 pm10:00 pmSame day
7:00 pm11:00 pmSame day
8:00 pm12:00 am+1 day
9:00 pm1:00 am+1 day
10:00 pm2:00 am+1 day
11:00 pm3:00 am+1 day

Daylight saving time

Atlantic Time observes daylight saving time; West Africa Time does not. The offset between the two zones changes when Atlantic Time transitions: on Sunday, November 1, 2026, clocks fall back from ADT to AST.

See the daylight saving time page for transition dates across every time zone.

Daylight today

Atlantic Time
Sunrise
5:31 AM
Sunset
8:56 PM
Day length
15h 25m
West Africa Time
Sunrise
6:31 AM
Sunset
7:00 PM
Day length
12h 29m

Daylight overlap: 9h 29m — 5:31 AM–3:00 PM in Atlantic Time (9:31 AM–7:00 PM in West Africa Time). Both locations are in daylight during this window.

Cities in these zones

Cities in Atlantic Time

Browse all cities to see the current local time anywhere.

Airports in these zones

Airports in Atlantic Time

  • YHZ

Airports in West Africa Time

  • LOS
  • KAN
  • IBA
  • ABV
  • PHC
  • KAD
  • BNI
  • ABB

Related conversions

Common conversions

What is 9:00 am AST-ATLANTIC in WAT?
9:00 am AST-ATLANTIC is 1:00 pm WAT.
What is 12:00 pm AST-ATLANTIC in WAT?
12:00 pm AST-ATLANTIC is 4:00 pm WAT.
What is 12:30 pm AST-ATLANTIC in WAT?
12:30 pm AST-ATLANTIC is 4:30 pm WAT.
What is 2:00 pm AST-ATLANTIC in WAT?
2:00 pm AST-ATLANTIC is 6:00 pm WAT.
What is 5:00 pm AST-ATLANTIC in WAT?
5:00 pm AST-ATLANTIC is 9:00 pm WAT.
What is 11:30 pm AST-ATLANTIC in WAT?
11:30 pm AST-ATLANTIC is 3:30 am WAT, the next day.