AST to China Time Converter
CST is 12 hours ahead of AST. 9:00 AM AST = 9:00 PM CST.
CST is 12 hours ahead of AST at the moment. To convert AST to China Time, add 12 hours to the AST time: 9:00 AM AST = 9:00 PM CST.
AST (Atlantic Time) is used in Nova Scotia, New Brunswick, PEI; Puerto Rico and the Eastern Caribbean (all year). China Time (China Time) is used in Mainland China and Taiwan (Beijing, Shanghai, Shenzhen, Taipei).
AST here is Atlantic Standard Time, not Arabia Standard Time.
AST to China Time time conversion table
AST to China Time on 6 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| AST | China Time | Day |
|---|---|---|
| 12:00 AM AST | 12:00 PM CST | — |
| 1:00 AM AST | 1:00 PM CST | — |
| 2:00 AM AST | 2:00 PM CST | — |
| 3:00 AM AST | 3:00 PM CST | — |
| 4:00 AM AST | 4:00 PM CST | — |
| 5:00 AM AST | 5:00 PM CST | — |
| 6:00 AM AST | 6:00 PM CST | — |
| 7:00 AM AST | 7:00 PM CST | — |
| 8:00 AM AST | 8:00 PM CST | — |
| 9:00 AM AST | 9:00 PM CST | — |
| 10:00 AM AST | 10:00 PM CST | night |
| 11:00 AM AST | 11:00 PM CST | night |
| 12:00 PM AST | 12:00 AM CST | next day |
| 1:00 PM AST | 1:00 AM CST | next day |
| 2:00 PM AST | 2:00 AM CST | next day |
| 3:00 PM AST | 3:00 AM CST | next day |
| 4:00 PM AST | 4:00 AM CST | next day |
| 5:00 PM AST | 5:00 AM CST | next day |
| 6:00 PM AST | 6:00 AM CST | next day |
| 7:00 PM AST | 7:00 AM CST | next day |
| 8:00 PM AST | 8:00 AM CST | next day |
| 9:00 PM AST | 9:00 AM CST | next day |
| 10:00 PM AST | 10:00 AM CST | next day |
| 11:00 PM AST | 11:00 AM CST | next day |
- Work rows — 9 AM–5 PM in both places
- Night in the destination (10 PM–6 AM)
How to convert AST to China Time
Add 12 hours to the AST time to get China Time.
Example: 9:00 AM AST = 9:00 PM CST.
Across midnight: 10:00 PM AST = 10:00 AM CST (next day). The date changes, so always check the day as well as the hour.
Time difference between AST and China Time
The time difference between AST and China Time 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:
- 31 Dec 2025 – 7 Mar 2026: China Time is 12 hours ahead of AST.
- 8 Mar 2026 – 31 Oct 2026: China Time is 11 hours ahead of AST.
- 1 Nov 2026 – 30 Dec 2026: China Time is 12 hours ahead of AST.
AST and China Time during daylight saving time
- 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).
- China Time does not observe daylight saving time; it stays on UTC+8 all year.
Best time for a meeting between AST and China Time
AST and China Time have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 7:00 AM AST, which is 7:00 PM CST.
AST to China Time FAQ
What is the time difference between AST and China Time?
Right now CST is 12 hours ahead of AST. The gap changes 3 times in 2026 because the two sides switch to daylight saving time on different dates.
What is 9 AM AST in China Time?
9:00 AM AST is 9:00 PM CST.
What is 12 PM (noon) AST in China Time?
12:00 PM AST is 12:00 AM CST (next day).
Is China Time ahead of or behind AST?
CST is 12 hours ahead of AST, so it is later in China Time than in AST.
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.
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.
What is the best time for a meeting between AST and China Time?
AST and China Time have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 7:00 AM AST, which is 7:00 PM CST.
Related conversions
Convert China Time to AST
Convert AST to other time zones
Convert other time zones to China Time
Learn more
Updated 6 November 2026. Time zone data: IANA tz database.