CST-CN to AST Converter
AST is 12 hours behind CST-CN
CST-CN to AST Conversion Table
Green rows indicate standard business hours (9 AM – 5 PM) in AST
| CST-CN | AST |
|---|---|
| 12:00 AM | 12:00 PM -1d |
| 1:00 AM | 1:00 PM -1d |
| 2:00 AM | 2:00 PM -1d |
| 3:00 AM | 3:00 PM -1d |
| 4:00 AM | 4:00 PM -1d |
| 5:00 AM | 5:00 PM -1d |
| 6:00 AM | 6:00 PM -1d |
| 7:00 AM | 7:00 PM -1d |
| 8:00 AM | 8:00 PM -1d |
| 9:00 AM | 9:00 PM -1d |
| 10:00 AM | 10:00 PM -1d |
| 11:00 AM | 11:00 PM -1d |
| 12:00 PM | 12:00 AM |
| 1:00 PM | 1:00 AM |
| 2:00 PM | 2:00 AM |
| 3:00 PM | 3:00 AM |
| 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 |
Converting China Standard Time to Atlantic Standard Time
China Standard Time (CST-CN) and Atlantic Standard Time (AST) are separated by a 12 hours time difference. AST is 12 hours behind CST-CN. CST-CN is UTC+8, used in China, while AST is UTC-4, used in Canada, Puerto Rico, US Virgin Islands.
When converting from CST-CN to AST, the key reference points to remember are: 9:00 AM CST-CN equals 9:00 PM AST, 12:00 PM noon CST-CN equals 12:00 AM AST, and 5:00 PM CST-CN equals 5:00 AM AST. The conversion table above shows every hour of the day mapped between these two time zones.
Scheduling Across CST-CN and AST
For professionals scheduling meetings between CST-CN and AST, finding overlapping business hours is essential. Standard business hours are typically 9:00 AM to 5:00 PM in each time zone. Given the 12 hours difference, the window of overlap may be limited, making early morning or late evening calls necessary for one party. Use the highlighted working hours in the conversion table above to quickly identify suitable meeting times.
Daylight Saving Time Considerations
CST-CN does not observe Daylight Saving Time, maintaining UTC+8 year-round. AST observes DST, switching to ADT (UTC-3). During DST transitions, the time difference between these zones may temporarily change by 1 hour. Always verify the current offset during spring and fall transition periods.