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DateAlmanac

What is SGT in AST?

Atlantic Time is 12 hours behind

Singapore Time is on UTC+8:00 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 Singapore
6:00:59 PM
Time in Halifax
6:00:59 AM
Difference
−12 h
Next clock change
March 14, 2027

When the difference changes

Singapore 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 12 hours behind
  2. March 14, 2027 – November 7, 2027Atlantic Time is 11 hours behind
  3. November 7, 2027 – onwardsAtlantic Time is 12 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

Singapore Time

No clock changes

Singapore Time stays on SGT 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.

SGT to AST conversion table

Every hour of Friday, November 13, 2026, converted from Singapore Time to Atlantic Time. 12 of the 24 hours fall on a different calendar day in Halifax, which is marked.

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

Scheduling between the two

There is no overlap between a nine-to-six working day in Singapore and one in Halifax — the gap is too wide. A call has to sit early or late for one side. Early morning in Singapore 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 (AST) is used in Nova Scotia, New Brunswick and Puerto Rico

Other conversions