US Pacific Time to Canada Atlantic Time
Convert times between US Pacific Time (PST, UTC-8:00) and Canada Atlantic Time (AST, UTC-4:00). Canada Atlantic Time is 4 hours ahead of US Pacific Time in standard time.
UTC-8:00 / -7:00→UTC-4:00 / -3:00
Live timezone converterUTC Offset Reference
| Timezone | Abbreviation | Standard offset | DST offset | Country |
|---|---|---|---|---|
| US Pacific Time | PST / PDT | UTC-8:00 | UTC-7:00 | United States |
| Canada Atlantic Time | AST / ADT | UTC-4:00 | UTC-3:00 | Canada |
* DST offset applies during summer months. Exact transition dates vary by year.
Standard Time Conversion (PST → AST)
| US Pacific Time | Canada Atlantic Time |
|---|---|
| 12:00 AM PST | 4:00 AM AST |
| 6:00 AM PST | 10:00 AM AST |
| 9:00 AM PST | 1:00 PM AST |
| 12:00 PM PST | 4:00 PM AST |
| 3:00 PM PST | 7:00 PM AST |
| 6:00 PM PST | 10:00 PM AST |
| 9:00 PM PST | 1:00 AM (next day) AST |
Daylight Saving Time (DST) Notes
- US Pacific Time observes DST. Clocks advance 1 hour to PDT (UTC-7:00) roughly from month 3 to 11.
- Canada Atlantic Time observes DST. Clocks advance 1 hour to ADT (UTC-3:00) roughly from month 3 to 11.
Frequently Asked Questions
How do I convert PST to AST?
Add 4 hours to the PST time to get AST. For example, 9:00 AM PST = 1:00 PM AST.
What is the current UTC offset for US Pacific Time?
US Pacific Time is UTC-8:00 during standard time (PST) and UTC-7:00 during summer daylight saving time (PDT).
Is Canada Atlantic Time ahead or behind US Pacific Time?
Canada Atlantic Time is 4 hours ahead of US Pacific Time in standard time.
When is a good time to schedule a meeting between PST and AST?
A good overlap window is around 9:00 AM PST / 1:00 PM AST, which falls within business hours for both timezones.
Related Timezone Conversions
US Pacific Time → US Eastern TimePST / ESTUS Pacific Time → US Central TimePST / CSTUS Pacific Time → US Mountain TimePST / MSTUS Pacific Time → US Alaska TimePST / AKSTUS Pacific Time → Hawaii TimePST / HSTUS Pacific Time → Greenwich Mean TimePST / GMTUS Pacific Time → India Standard TimePST / ISTUS Pacific Time → China Standard TimePST / CST
Need the exact current time?
Use the live ToolsHub timezone converter to see current times, DST status, and schedule across time zones.