Highlighted rows fall within 09:00–18:00 in both places: 5 shared working hours.
How many hours is PST behind AST?
As abbreviations, AST is always 4 hours ahead of PST: PST is UTC−8 and AST is UTC−4. To convert, add 4 hours.
Check which label you actually need: PST (Pacific Time is on PDT today) and AST (Atlantic Time is on ADT today). A time written with an abbreviation that is not in use is usually meant as the local time, so convert between the places instead: right now AST is 4 hours ahead of PST.
Does the PST to AST time difference change?
No. Ast is 4 hours ahead of pst all year, because both places change their clocks on the same dates.
Calling hours for PST and AST
When AST is 4 hours ahead of PST: 4 shared office hours, 09:00 to 13:00 in PST (13:00 to 17:00 in AST).
Frequently asked questions about PST and AST time
How many hours ahead is AST of PST?
AST (UTC−4) is 4 hours ahead of PST (UTC−8).
Does the time difference between PST and AST change during the year?
No, it stays 4 hours ahead all year because both places change their clocks on the same dates.