What is SGT in AST?
Atlantic Time is 11 hours behind
Singapore Time is on UTC+8:00 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 Singapore
- 8:53:18 PM
- Time in Halifax
- 9:53:18 AM
- Difference
- −11 h
- Next clock change
- November 1, 2026
Convert a time
ADT — Atlantic Time
9:00 am
ADT, Fri
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:
- Now – November 1, 2026Atlantic Time is 11 hours behind
- November 1, 2026 – March 14, 2027Atlantic Time is 12 hours behind
- March 14, 2027 – onwardsAtlantic Time is 11 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
Singapore Time stays on SGT all year, so its offset from UTC never moves.
Atlantic Time
Clocks go back one hour — 2:00 am becomes 1:00 am local time, and the zone is on AST after that.
SGT to AST conversion table
Every hour of Friday, September 25, 2026, converted from Singapore Time to Atlantic Time. 11 of the 24 hours fall on a different calendar day in Halifax, which is marked.
- 12:00 am SGT
- 1:00 pm ADT−1 day
- 1:00 am SGT
- 2:00 pm ADT−1 day
- 2:00 am SGT
- 3:00 pm ADT−1 day
- 3:00 am SGT
- 4:00 pm ADT−1 day
- 4:00 am SGT
- 5:00 pm ADT−1 day
- 5:00 am SGT
- 6:00 pm ADT−1 day
- 6:00 am SGT
- 7:00 pm ADT−1 day
- 7:00 am SGT
- 8:00 pm ADT−1 day
- 8:00 am SGT
- 9:00 pm ADT−1 day
- 9:00 am SGT
- 10:00 pm ADT−1 day
- 10:00 am SGT
- 11:00 pm ADT−1 day
- 11:00 am SGT
- 12:00 am ADT
- 12:00 pm SGT
- 1:00 am ADT
- 1:00 pm SGT
- 2:00 am ADT
- 2:00 pm SGT
- 3:00 am ADT
- 3:00 pm SGT
- 4:00 am ADT
- 4:00 pm SGT
- 5:00 am ADT
- 5:00 pm SGT
- 6:00 am ADT
- 6:00 pm SGT
- 7:00 am ADT
- 7:00 pm SGT
- 8:00 am ADT
- 8:00 pm SGT
- 9:00 am ADT
- 9:00 pm SGT
- 10:00 am ADT
- 10:00 pm SGT
- 11:00 am ADT
- 11:00 pm SGT
- 12:00 pm ADT
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 (ADT) is used in Nova Scotia, New Brunswick and Puerto Rico
Other conversions
- AST to SGT
- SGT to UTC
- SGT to GMT
- SGT to EST
- SGT to CST
- SGT to MST
- SGT to PST
- SGT to AKST
- SGT to HST
- SGT to BST
- SGT to CET
- SGT to IST
- SGT to CST (China)
- SGT to JST
- SGT to AEST
- SGT to Mexico City
- SGT to BRT
- SGT to ART
- SGT to EET
- SGT to WET
- SGT to MSK
- SGT to TRT
- SGT to SAST
- SGT to WAT
- SGT to EAT
- SGT to GST
- SGT to PKT
- SGT to ICT
- SGT to WIB
- SGT to HKT
- SGT to KST
- SGT to PHT
- SGT to AWST
- SGT to ACST
- SGT to NZST
- All zones