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DateAlmanac

What is WET in AST?

Atlantic Time is 4 hours behind

Western European Time is on UTC+1:00 and Atlantic Time is on UTC−3:00 right now. Both are on daylight saving, so their clocks read WEST and ADT. The gap changes during the year — see below.

Time in Lisbon
1:03:55 PM
Time in Halifax
9:03:55 AM
Difference
−4 h
Next clock change
October 25, 2026

Convert a time

ADT — Atlantic Time

9:00 am

ADT, Fri

When the difference changes

Western European Time and Atlantic Time do not change their clocks on the same dates, so the gap between them is not the same all year. Most converters show only today’s figure. These are the periods ahead:

  1. Now – October 25, 2026Atlantic Time is 4 hours behind
  2. October 25, 2026 – November 1, 2026Atlantic Time is 3 hours behind
  3. November 1, 2026 – March 14, 2027Atlantic Time is 4 hours behind
  4. March 14, 2027 – March 28, 2027Atlantic Time is 3 hours behind
  5. March 28, 2027 – onwardsAtlantic Time is 4 hours behind

Periods shorter than a day are not listed. Each zone changes at its own local time, so on a date when both move there are a few hours when the gap is briefly something else.

Daylight saving

Western European Time

Sunday, October 25, 2026

Clocks go back one hour — 2:00 am becomes 1:00 am local time, and the zone is on WET after that.

Atlantic Time

Sunday, November 1, 2026

Clocks go back one hour — 2:00 am becomes 1:00 am local time, and the zone is on AST after that.

WET to AST conversion table

Every hour of Friday, September 25, 2026, converted from Western European Time to Atlantic Time. 4 of the 24 hours fall on a different calendar day in Halifax, which is marked.

12:00 am WEST
8:00 pm ADT−1 day
1:00 am WEST
9:00 pm ADT−1 day
2:00 am WEST
10:00 pm ADT−1 day
3:00 am WEST
11:00 pm ADT−1 day
4:00 am WEST
12:00 am ADT
5:00 am WEST
1:00 am ADT
6:00 am WEST
2:00 am ADT
7:00 am WEST
3:00 am ADT
8:00 am WEST
4:00 am ADT
9:00 am WEST
5:00 am ADT
10:00 am WEST
6:00 am ADT
11:00 am WEST
7:00 am ADT
12:00 pm WEST
8:00 am ADT
1:00 pm WEST
9:00 am ADT
2:00 pm WEST
10:00 am ADT
3:00 pm WEST
11:00 am ADT
4:00 pm WEST
12:00 pm ADT
5:00 pm WEST
1:00 pm ADT
6:00 pm WEST
2:00 pm ADT
7:00 pm WEST
3:00 pm ADT
8:00 pm WEST
4:00 pm ADT
9:00 pm WEST
5:00 pm ADT
10:00 pm WEST
6:00 pm ADT
11:00 pm WEST
7:00 pm ADT

Scheduling between the two

Working hours overlap from 1:00 pm to 6:00 pm WEST, which is 9:00 am to 2:00 pm ADT. Anything inside that window falls in the normal working day at both ends.

A note on AST: it can also mean Arabia Standard Time (UTC+3). This page means Atlantic Time.

Western European Time (WEST) is used in Portugal, Ireland and the Canary Islands

Atlantic Time (ADT) is used in Nova Scotia, New Brunswick and Puerto Rico

Other conversions