AST to PST Converter
PST is 4 hours behind AST
AST to PST Conversion Table
Green rows indicate standard business hours (9 AM – 5 PM) in PST
| AST | PST |
|---|---|
| 12:00 AM | 8:00 PM -1d |
| 1:00 AM | 9:00 PM -1d |
| 2:00 AM | 10:00 PM -1d |
| 3:00 AM | 11:00 PM -1d |
| 4:00 AM | 12:00 AM |
| 5:00 AM | 1:00 AM |
| 6:00 AM | 2:00 AM |
| 7:00 AM | 3:00 AM |
| 8:00 AM | 4:00 AM |
| 9:00 AM | 5:00 AM |
| 10:00 AM | 6:00 AM |
| 11:00 AM | 7:00 AM |
| 12:00 PM | 8:00 AM |
| 1:00 PM | 9:00 AM |
| 2:00 PM | 10:00 AM |
| 3:00 PM | 11:00 AM |
| 4:00 PM | 12:00 PM |
| 5:00 PM | 1:00 PM |
| 6:00 PM | 2:00 PM |
| 7:00 PM | 3:00 PM |
| 8:00 PM | 4:00 PM |
| 9:00 PM | 5:00 PM |
| 10:00 PM | 6:00 PM |
| 11:00 PM | 7:00 PM |
Converting Atlantic Standard Time to Pacific Standard Time
Atlantic Standard Time (AST) and Pacific Standard Time (PST) are separated by a 4 hours time difference. PST is 4 hours behind AST. AST is UTC-4, used in Canada, Puerto Rico, US Virgin Islands, while PST is UTC-8, used in United States, Canada.
When converting from AST to PST, the key reference points to remember are: 9:00 AM AST equals 5:00 AM PST, 12:00 PM noon AST equals 8:00 AM PST, and 5:00 PM AST equals 1:00 PM PST. The conversion table above shows every hour of the day mapped between these two time zones.
Scheduling Across AST and PST
For professionals scheduling meetings between AST and PST, finding overlapping business hours is essential. Standard business hours are typically 9:00 AM to 5:00 PM in each time zone. Given the 4 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
AST observes Daylight Saving Time, switching to ADT (UTC-3) during summer months. PST observes DST, switching to PDT (UTC-7). 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.