Offset
The time difference between Singapore Time and Atlantic Time is 11 hours.
Singapore Time (SGT) is ahead of Atlantic Time (ADT).
SGT: UTC+8
ADT: UTC-3
Atlantic Time is currently observing daylight saving time; Singapore Time is not.
When to schedule
Standard business hours (9 AM–5 PM, Mon–Fri) in Singapore Time and Atlantic Time don't overlap on the same weekday. Atlantic Time is 11 hours behind Singapore Time.
With some flexibility, there’s a workable window outside standard hours:
- 6 PM–8 PM in Singapore Time (7 AM–9 AM in Atlantic Time) — suggest 7:00 PM Singapore Time (8:00 AM Atlantic Time).
This means an early start or late finish for one side, but it’s a reasonable slot for a one-off meeting.
This window may shift by an hour during daylight saving time.
Public holidays in 2026
National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.
Singapore
- New Year's DayThu, Jan 1
- Chinese New YearTue, Feb 17
- Chinese New YearWed, Feb 18
- Hari Raya PuasaFri, Mar 20
- Good FridayFri, Apr 3
- Labour DayFri, May 1
- Hari Raya Haji (Tentative Date)Wed, May 27
- National DayMon, Aug 10
- DeepavaliMon, Nov 9
- Christmas DayFri, Dec 25
Canada
- New Year's DayThu, Jan 1
- Good FridayFri, Apr 3
- Victoria DayMon, May 18
- Canada DayWed, Jul 1
- Labour DayMon, Sep 7
- National Day for Truth and ReconciliationWed, Sep 30
- ThanksgivingMon, Oct 12
- Christmas DayFri, Dec 25
About these zones
Singapore Time is also known as SGT. To call Singapore, dial +65.
Atlantic Time is also known as AST, or ADT. To call Canada, dial +1.
Atlantic Time is approximately 9,150 miles north of Singapore Time.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| SGT | AST-ATLANTIC | Day |
|---|---|---|
| 12:00 am | 1:00 pm | -1 day |
| 1:00 am | 2:00 pm | -1 day |
| 2:00 am | 3:00 pm | -1 day |
| 3:00 am | 4:00 pm | -1 day |
| 4:00 am | 5:00 pm | -1 day |
| 5:00 am | 6:00 pm | -1 day |
| 6:00 am | 7:00 pm | -1 day |
| 7:00 am | 8:00 pm | -1 day |
| 8:00 am | 9:00 pm | -1 day |
| 9:00 am | 10:00 pm | -1 day |
| 10:00 am | 11:00 pm | -1 day |
| 11:00 am | 12:00 am | Same day |
| 12:00 pm | 1:00 am | Same day |
| 1:00 pm | 2:00 am | Same day |
| 2:00 pm | 3:00 am | Same day |
| 3:00 pm | 4:00 am | Same day |
| 4:00 pm | 5:00 am | Same day |
| 5:00 pm | 6:00 am | Same day |
| 6:00 pm | 7:00 am | Same day |
| 7:00 pm | 8:00 am | Same day |
| 8:00 pm | 9:00 am | Same day |
| 9:00 pm | 10:00 am | Same day |
| 10:00 pm | 11:00 am | Same day |
| 11:00 pm | 12:00 pm | Same day |
Daylight saving time
Atlantic Time observes daylight saving time; Singapore Time does not. The offset between the two zones changes when Atlantic Time transitions: on Sunday, November 1, 2026, clocks fall back from ADT to AST.
See the daylight saving time page for transition dates across every time zone.
Daylight today
- Sunrise
- 6:58 AM
- Sunset
- 7:10 PM
- Day length
- 12h 12m
- Sunrise
- 5:31 AM
- Sunset
- 8:56 PM
- Day length
- 15h 25m
Daylight overlap: 2h 39m — 4:31 PM–7:10 PM in Singapore Time (5:31 AM–8:10 AM in Atlantic Time). Both locations are in daylight during this window.
Cities in these zones
Cities in Singapore Time
Cities in Atlantic Time
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in Singapore Time
- SIN
Airports in Atlantic Time
- YHZ
Related conversions
Common conversions
- What is 9:00 am SGT in AST-ATLANTIC?
- 9:00 am SGT is 10:00 pm AST-ATLANTIC, the previous day.
- What is 12:00 pm SGT in AST-ATLANTIC?
- 12:00 pm SGT is 1:00 am AST-ATLANTIC.
- What is 12:30 pm SGT in AST-ATLANTIC?
- 12:30 pm SGT is 1:30 am AST-ATLANTIC.
- What is 2:00 pm SGT in AST-ATLANTIC?
- 2:00 pm SGT is 3:00 am AST-ATLANTIC.
- What is 5:00 pm SGT in AST-ATLANTIC?
- 5:00 pm SGT is 6:00 am AST-ATLANTIC.
- What is 11:30 pm SGT in AST-ATLANTIC?
- 11:30 pm SGT is 12:30 pm AST-ATLANTIC.