There is no overlap between 09:00–18:00 working days in these two places.
How many hours is PST behind AST?
As abbreviations, AST is always 11 hours ahead of PST: PST is UTC−8 and AST is UTC+3. To convert, add 11 hours.
When the PST to AST time difference changes
For most of the year AST is 10 hours ahead of PST. From 1 November to 31 December 2026, AST is 11 hours ahead of PST instead, because the two places change their clocks on different dates. Meetings booked by the usual gap land an hour off in those weeks.
Dates
AST vs PST
Length
1 November 2026 to 31 December 2026
11 hours ahead
61 days
1 January 2027 to 13 March 2027
11 hours ahead
72 days
14 March 2027 to 6 November 2027
10 hours ahead
238 days
7 November 2027 to 31 December 2027
11 hours ahead
55 days
Best time for a meeting between PST and AST
When AST is 10 hours ahead of PST: no shared 09:00 to 17:00 hours; try 07:00 in PST (17:00 in AST).
When AST is 11 hours ahead of PST: no shared 09:00 to 17:00 hours; try 07:00 in PST (18:00 in AST).
Frequently asked questions about PST and AST time
How many hours ahead is AST of PST?
AST (UTC+3) is 11 hours ahead of PST (UTC−8).
Does the time difference between PST and AST change?
Yes. It is usually 10 hours ahead, but changes when one side moves its clocks: 11 hours ahead from 1 November to 31 December 2026; 11 hours ahead from 1 January to 13 March 2027.