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