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DateAlmanac

What is SAST in AST?

Atlantic Time is 6 hours behind

South Africa Standard Time is on UTC+2:00 and Atlantic Time is on UTC−4:00 right now. The gap changes during the year — see below.

Convert a time

AST — Atlantic Time

6:00 am

AST, Fri

Time in Johannesburg
12:00:48 PM
Time in Halifax
6:00:48 AM
Difference
−6 h
Next clock change
March 14, 2027

When the difference changes

South Africa Standard 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 – March 14, 2027Atlantic Time is 6 hours behind
  2. March 14, 2027 – November 7, 2027Atlantic Time is 5 hours behind
  3. November 7, 2027 – onwardsAtlantic Time is 6 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

South Africa Standard Time

No clock changes

South Africa Standard Time stays on SAST all year, so its offset from UTC never moves.

Atlantic Time

Sunday, March 14, 2027

Clocks go forward one hour — 2:00 am becomes 3:00 am local time, and the zone is on ADT after that.

SAST to AST conversion table

Every hour of Friday, November 13, 2026, converted from South Africa Standard Time to Atlantic Time. 6 of the 24 hours fall on a different calendar day in Halifax, which is marked.

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

Scheduling between the two

Working hours overlap from 3:00 pm to 6:00 pm SAST, which is 9:00 am to 12:00 pm AST. 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.

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

Other conversions