CST to AST Converter
AST is 2 hours ahead of CST
CST to AST Conversion Table
Green rows indicate standard business hours (9 AM – 5 PM) in AST
| CST | AST |
|---|---|
| 12:00 AM | 2:00 AM |
| 1:00 AM | 3:00 AM |
| 2:00 AM | 4:00 AM |
| 3:00 AM | 5:00 AM |
| 4:00 AM | 6:00 AM |
| 5:00 AM | 7:00 AM |
| 6:00 AM | 8:00 AM |
| 7:00 AM | 9:00 AM |
| 8:00 AM | 10:00 AM |
| 9:00 AM | 11:00 AM |
| 10:00 AM | 12:00 PM |
| 11:00 AM | 1:00 PM |
| 12:00 PM | 2:00 PM |
| 1:00 PM | 3:00 PM |
| 2:00 PM | 4:00 PM |
| 3:00 PM | 5:00 PM |
| 4:00 PM | 6:00 PM |
| 5:00 PM | 7:00 PM |
| 6:00 PM | 8:00 PM |
| 7:00 PM | 9:00 PM |
| 8:00 PM | 10:00 PM |
| 9:00 PM | 11:00 PM |
| 10:00 PM | 12:00 AM +1d |
| 11:00 PM | 1:00 AM +1d |
Converting Central Standard Time to Atlantic Standard Time
Central Standard Time (CST) and Atlantic Standard Time (AST) are separated by a 2 hours time difference. AST is 2 hours ahead of CST. CST is UTC-6, used in United States, Canada, Mexico, while AST is UTC-4, used in Canada, Puerto Rico, US Virgin Islands.
When converting from CST to AST, the key reference points to remember are: 9:00 AM CST equals 11:00 AM AST, 12:00 PM noon CST equals 2:00 PM AST, and 5:00 PM CST equals 7:00 PM AST. The conversion table above shows every hour of the day mapped between these two time zones.
Scheduling Across CST and AST
For professionals scheduling meetings between CST 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 2 hours difference, the window of overlap may be limited. Use the highlighted working hours in the conversion table above to quickly identify suitable meeting times.
Daylight Saving Time Considerations
CST observes Daylight Saving Time, switching to CDT (UTC-5) during summer months. 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.