China Time to AST Converter
AST is 12 hours behind CST. 9:00 AM CST = 9:00 PM AST (previous day).
AST is 12 hours behind CST at the moment. To convert China Time to AST, subtract 12 hours from the China Time time: 9:00 AM CST = 9:00 PM AST (previous day).
China Time (China Time) is used in Mainland China and Taiwan (Beijing, Shanghai, Shenzhen, Taipei). 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.
China Time to AST time conversion table
China Time to AST on 7 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| China Time | AST | Day |
|---|---|---|
| 12:00 AM CST | 12:00 PM AST | previous day |
| 1:00 AM CST | 1:00 PM AST | previous day |
| 2:00 AM CST | 2:00 PM AST | previous day |
| 3:00 AM CST | 3:00 PM AST | previous day |
| 4:00 AM CST | 4:00 PM AST | previous day |
| 5:00 AM CST | 5:00 PM AST | previous day |
| 6:00 AM CST | 6:00 PM AST | previous day |
| 7:00 AM CST | 7:00 PM AST | previous day |
| 8:00 AM CST | 8:00 PM AST | previous day |
| 9:00 AM CST | 9:00 PM AST | previous day |
| 10:00 AM CST | 10:00 PM AST | previous day |
| 11:00 AM CST | 11:00 PM AST | previous day |
| 12:00 PM CST | 12:00 AM AST | night |
| 1:00 PM CST | 1:00 AM AST | night |
| 2:00 PM CST | 2:00 AM AST | night |
| 3:00 PM CST | 3:00 AM AST | night |
| 4:00 PM CST | 4:00 AM AST | night |
| 5:00 PM CST | 5:00 AM AST | night |
| 6:00 PM CST | 6:00 AM AST | — |
| 7:00 PM CST | 7:00 AM AST | — |
| 8:00 PM CST | 8:00 AM AST | — |
| 9:00 PM CST | 9:00 AM AST | — |
| 10:00 PM CST | 10:00 AM AST | — |
| 11:00 PM CST | 11:00 AM AST | — |
- Work rows — 9 AM–5 PM in both places
- Night in the destination (10 PM–6 AM)
How to convert China Time to AST
Subtract 12 hours from the China Time time to get AST.
Example: 9:00 AM CST = 9:00 PM AST (previous day).
Across midnight: 1:00 AM CST = 1:00 PM AST (previous day). The date changes, so always check the day as well as the hour.
Time difference between China Time and AST
The time difference between China Time 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 China Time.
- 8 Mar 2026 – 31 Oct 2026: AST is 11 hours behind of China Time.
- 1 Nov 2026 – 31 Dec 2026: AST is 12 hours behind of China Time.
China Time and AST during daylight saving time
- China Time 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 China Time and AST
China Time and AST have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 7:00 AM CST, which is 7:00 PM AST.
China Time to AST FAQ
What is the time difference between China Time and AST?
Right now AST is 12 hours behind CST. The gap changes 3 times in 2026 because the two sides switch to daylight saving time on different dates.
What is 9 AM China Time in AST?
9:00 AM CST is 9:00 PM AST (previous day).
What is 12 PM (noon) China Time in AST?
12:00 PM CST is 12:00 AM AST.
Is AST ahead of or behind China Time?
AST is 12 hours behind CST, so it is earlier in AST than in China Time.
Does China Time change for daylight saving time?
No. China Time 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 China Time and AST?
China Time and AST have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 7:00 AM CST, which is 7:00 PM AST.
Related conversions
Convert AST to China Time
Convert China Time to other time zones
Convert other time zones to AST
Learn more
Updated 7 November 2026. Time zone data: IANA tz database.