AST to EST Converter
EST is 1 hour behind AST
AST to EST Conversion Table
Green rows indicate standard business hours (9 AM – 5 PM) in EST
| AST | EST |
|---|---|
| 12:00 AM | 11:00 PM -1d |
| 1:00 AM | 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 |
Converting Atlantic Standard Time to Eastern Standard Time
Atlantic Standard Time (AST) and Eastern Standard Time (EST) are separated by a 1 hour time difference. EST is 1 hour behind AST. AST is UTC-4, used in Canada, Puerto Rico, US Virgin Islands, while EST is UTC-5, used in United States, Canada, Jamaica.
When converting from AST to EST, the key reference points to remember are: 9:00 AM AST equals 8:00 AM EST, 12:00 PM noon AST equals 11:00 AM EST, and 5:00 PM AST equals 4:00 PM EST. The conversion table above shows every hour of the day mapped between these two time zones.
Scheduling Across AST and EST
For professionals scheduling meetings between AST and EST, finding overlapping business hours is essential. Standard business hours are typically 9:00 AM to 5:00 PM in each time zone. Given the 1 hour 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
AST observes Daylight Saving Time, switching to ADT (UTC-3) during summer months. EST observes DST, switching to EDT (UTC-4). 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.