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DateAlmanac

What is WIB in AST?

Atlantic Time is 10 hours behind

Western Indonesian Time is on UTC+7:00 and Atlantic Time is on UTC−3:00 right now. Atlantic Time is on daylight saving, so its clocks read ADT. The gap changes during the year — see below.

Time in Jakarta
7:52:29 PM
Time in Halifax
9:52:29 AM
Difference
−10 h
Next clock change
November 1, 2026

Convert a time

ADT — Atlantic Time

9:00 am

ADT, Fri

When the difference changes

Western Indonesian 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 – November 1, 2026Atlantic Time is 10 hours behind
  2. November 1, 2026 – March 14, 2027Atlantic Time is 11 hours behind
  3. March 14, 2027 – onwardsAtlantic Time is 10 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 Indonesian Time

No clock changes

Western Indonesian Time stays on WIB all year, so its offset from UTC never moves.

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.

WIB to AST conversion table

Every hour of Friday, September 25, 2026, converted from Western Indonesian Time to Atlantic Time. 10 of the 24 hours fall on a different calendar day in Halifax, which is marked.

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

Scheduling between the two

There is no overlap between a nine-to-six working day in Jakarta and one in Halifax — the gap is too wide. A call has to sit early or late for one side. Early morning in Jakarta is the usual compromise, since that is late afternoon or evening in Halifax.

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

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

Other conversions