SGT to AST Converter
AST is 12 hours behind SGT. 9:00 AM SGT = 9:00 PM AST (previous day).
AST is 12 hours behind SGT at the moment. To convert SGT to AST, subtract 12 hours from the SGT time: 9:00 AM SGT = 9:00 PM AST (previous day).
SGT (Singapore Time) is used in Singapore. AST (Atlantic Time) is used in Nova Scotia, New Brunswick, PEI; Puerto Rico and the Eastern Caribbean (all year).
AST here is Atlantic Standard Time, not Arabia Standard Time.
SGT to AST time conversion table
SGT to AST on 7 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| SGT | AST |
|---|---|
| 12:00 AM | 12:00 PM−1 |
| 1:00 AM | 1:00 PM−1 |
| 2:00 AM | 2:00 PM−1 |
| 3:00 AM | 3:00 PM−1 |
| 4:00 AM | 4:00 PM−1 |
| 5:00 AM | 5:00 PM−1 |
| 6:00 AM | 6:00 PM−1 |
| 7:00 AM | 7:00 PM−1 |
| SGT | AST |
|---|---|
| 8:00 AM | 8:00 PM−1 |
| 9:00 AM | 9:00 PM−1 |
| 10:00 AM | 10:00 PM−1 |
| 11:00 AM | 11:00 PM−1 |
| 12:00 PM | 12:00 AM |
| 1:00 PM | 1:00 AM |
| 2:00 PM | 2:00 AM |
| 3:00 PM | 3:00 AM |
| SGT | AST |
|---|---|
| 4:00 PM | 4:00 AM |
| 5:00 PM | 5:00 AM |
| 6:00 PM | 6:00 AM |
| 7:00 PM | 7:00 AM |
| 8:00 PM | 8:00 AM |
| 9:00 PM | 9:00 AM |
| 10:00 PM | 10:00 AM |
| 11:00 PM | 11:00 AM |
Conversion table from SGT to AST for 7 Nov 2026. A tick marks hours that fall between 9 AM and 5 PM in both places. +1 means the next day in AST, −1 the previous day.
- ✓ marks 9 AM–5 PM in both places
- Greyed times are night in the destination (10 PM–6 AM)
How to convert SGT to AST
Subtract 12 hours from the SGT time to get AST.
Example: 9:00 AM SGT = 9:00 PM AST (previous day).
Across midnight: 1:00 AM SGT = 1:00 PM AST (previous day). The date changes, so always check the day as well as the hour.
Time difference between SGT and AST
The time difference between SGT and AST is not the same all year, because the two sides change for daylight saving time on different dates. In 2026 it works out like this:
- 1 Jan 2026 – 7 Mar 2026: AST is 12 hours behind of SGT.
- 8 Mar 2026 – 31 Oct 2026: AST is 11 hours behind of SGT.
- 1 Nov 2026 – 31 Dec 2026: AST is 12 hours behind of SGT.
SGT and AST during daylight saving time
- SGT does not observe daylight saving time; it stays on UTC+8 all year.
- AST next changes on 14 Mar 2027: clocks go forward one hour at 01:59 local time, from AST (UTC−4) to ADT (UTC−3).
Best time for a meeting between SGT and AST
SGT and AST have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 7:00 AM SGT, which is 7:00 PM AST.
SGT to AST FAQ
What is the time difference between SGT and AST?
Right now AST is 12 hours behind SGT. The gap changes 3 times in 2026 because the two sides switch to daylight saving time on different dates.
What is 9 AM SGT in AST?
9:00 AM SGT is 9:00 PM AST (previous day).
What is 12 PM (noon) SGT in AST?
12:00 PM SGT is 12:00 AM AST.
Is AST ahead of or behind SGT?
AST is 12 hours behind SGT, so it is earlier in AST than in SGT.
Does SGT change for daylight saving time?
No. SGT stays on the same offset all year, so conversions never shift for daylight saving time.
Does AST change for daylight saving time?
Yes. AST next changes on 14 Mar 2027, when clocks go forward one hour from AST to ADT.
What is the best time for a meeting between SGT and AST?
SGT and AST have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 7:00 AM SGT, which is 7:00 PM AST.
Related conversions
Convert AST to SGT
Convert SGT to other time zones
Convert other time zones to AST
Learn more
Updated 7 November 2026. Time zone data: IANA tz database.