AST to SGT: AST is 11 hours behind SGT

Atlantic Time is 11 hours behind Singapore Time right now. It is 3:19 am ADT in Atlantic and 2:19 pm SGT in Singapore.

Convert a specific time from AST to SGT

Pick any time and date to convert it both ways. The conversion runs in your browser against the real zone rules, so a date inside a daylight saving period gets that period's offset rather than today's.

What is the time difference between AST and SGT?

Singapore Time is 11 hours ahead of Atlantic Time. To go from AST to SGT you add 11 hours. That gap is not fixed. Across 2026 the distance between these two zones takes 2 different values, from 11 hours to 12 hours, because Atlantic moves its clocks and Singapore does not. This page recomputes it rather than assuming.

AST to SGT conversion table

Every hour of Friday, September 25, 2026 in Atlantic, with the matching reading in Singapore. 11 of the 24 hours land on a different calendar date in Singapore, which is the part people get wrong when they schedule across this pair.

What are the best hours to schedule a call between AST and SGT?

No hour of the standard 9:00 am to 5:00 pm working day falls inside working hours on both sides. Atlantic and Singapore are 11 hours apart, which is too far for an overlap, so somebody has to take a call outside their own working day. The least painful options are below, ranked by how close both sides sit to the middle of the afternoon.

Does daylight saving change AST to SGT?

Atlantic Time is currently on ADT and changes next on Sunday, November 1, 2026, when the clock falls back from 1:59 am to 1:00 am and the offset moves from UTC-3 to UTC-4.

Singapore Time does not move its clocks at all, so its UTC+8 offset holds every day of the year.

Because the two sides do not move together, the answer to this conversion changes during the year. For part of the year the gap is 11 hours and for the rest it is 12 hours. The table above is built for today, not for an average day.

Is AST ahead of or behind SGT?

AST is behind SGT by 11 hours: when it is 12:00 pm in Atlantic, it is 11:00 pm in Singapore. One wrinkle worth knowing: AST and ADT are two names for the same zone, not two zones. Atlantic Time reads AST in winter and ADT in summer. When somebody types "ast to sgt" they nearly always mean the zone rather than the literal winter offset, so this page resolves AST to America/Halifax and SGT to Asia/Singapore and applies whichever offset is genuinely in force on the day.

Atlantic Time covers Halifax, Moncton and the Canadian Maritimes. Singapore Time covers Singapore, and the same reading as Kuala Lumpur. The identifiers behind them are America/Halifax and Asia/Singapore, which is what any calendar or scheduling system should be storing rather than a fixed number of hours.

Questions

What is AST in SGT?

AST is 11 hours behind SGT. 9:00 am AST is 8:00 pm SGT.

How many hours ahead is SGT of AST?

SGT is 11 hours ahead of AST. That varies across the year, between 11 hours and 12 hours.

What time is it in Singapore right now?

2:19 pm SGT on Friday, September 25, 2026.

When can Atlantic and Singapore meet during working hours?

There is no shared working hour. The closest fit is 7:00 am AST, which is 6:00 pm SGT.

Does this account for daylight saving?

Yes. Every reading is computed from the IANA database for the actual date, so ADT and SGT are the abbreviations genuinely in force today rather than a fixed assumption.

Other conversions

All timezone conversions

12 and 24 hour converter · 8 hours from now · Today · Day counter