Convert PST to AST
Convert a time in PST to AST, with daylight-saving changes applied for the date you choose.
PST to AST
Time in PST, North America
Time in AST, North America
- PST now
- —
- AST now
- —
Time zone details
PST, North America
- IANA zone
- Etc/GMT+8
- Standard offset
- UTC-08:00
- Daylight saving
- Not observed
AST, North America
- IANA zone
- Etc/GMT+4
- Standard offset
- UTC-04:00
- 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 AST to PST.
Related time zones conversions
Frequently asked questions
What is the time difference between PST and AST?+
PST is UTC-08:00 and AST is UTC-04:00 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 PST observe daylight saving time?+
No. PST stays on UTC-08:00 all year.
Does AST observe daylight saving time?+
No. AST stays on UTC-04:00 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.