Convert AST to PST
Convert a time in AST to PST, with daylight-saving changes applied for the date you choose.
AST to PST
Time in AST, North America
Time in PST, North America
- AST now
- —
- PST now
- —
Time zone details
AST, North America
- IANA zone
- Etc/GMT+4
- Standard offset
- UTC-04:00
- Daylight saving
- Not observed
PST, North America
- IANA zone
- Etc/GMT+8
- Standard offset
- UTC-08:00
- Daylight saving
- Not observed
Sunrise and sunset are calculated for the city centre and are accurate to about a minute. Local elevation and atmospheric conditions shift the observed horizon.
Need the reverse direction? Convert PST to AST.
Related time zones conversions
Frequently asked questions
What is the time difference between AST and PST?+
AST is UTC-04:00 and PST is UTC-08:00 in standard time. The gap between them changes during the year if either place observes daylight saving, so enter a date to see the difference on that day.
Does AST observe daylight saving time?+
No. AST stays on UTC-04:00 all year.
Does PST observe daylight saving time?+
No. PST stays on UTC-08:00 all year.
Why does one local time sometimes have two answers?+
When clocks go back, the hour before the change repeats, so that local reading happens twice and both instants are valid. When clocks go forward, the skipped hour never occurs, so that reading has no matching instant at all. The converter reports both cases rather than guessing.