US Eastern Time to Canada Atlantic Time
Convert times between US Eastern Time (EST, UTC-5:00) and Canada Atlantic Time (AST, UTC-4:00). Canada Atlantic Time is 1 hour ahead of US Eastern Time in standard time.
UTC-5:00 / -4:00→UTC-4:00 / -3:00
Live timezone converterUTC Offset Reference
| Timezone | Abbreviation | Standard offset | DST offset | Country |
|---|---|---|---|---|
| US Eastern Time | EST / EDT | UTC-5:00 | UTC-4:00 | 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 (EST → AST)
| US Eastern Time | Canada Atlantic Time |
|---|---|
| 12:00 AM EST | 1:00 AM AST |
| 6:00 AM EST | 7:00 AM AST |
| 9:00 AM EST | 10:00 AM AST |
| 12:00 PM EST | 1:00 PM AST |
| 3:00 PM EST | 4:00 PM AST |
| 6:00 PM EST | 7:00 PM AST |
| 9:00 PM EST | 10:00 PM AST |
Daylight Saving Time (DST) Notes
- US Eastern Time observes DST. Clocks advance 1 hour to EDT (UTC-4:00) 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 EST to AST?
Add 1 hours to the EST time to get AST. For example, 9:00 AM EST = 10:00 AM AST.
What is the current UTC offset for US Eastern Time?
US Eastern Time is UTC-5:00 during standard time (EST) and UTC-4:00 during summer daylight saving time (EDT).
Is Canada Atlantic Time ahead or behind US Eastern Time?
Canada Atlantic Time is 1 hour ahead of US Eastern Time in standard time.
When is a good time to schedule a meeting between EST and AST?
A good overlap window is around 9:00 AM EST / 10:00 AM AST, which falls within business hours for both timezones.
Related Timezone Conversions
US Eastern Time → US Central TimeEST / CSTUS Eastern Time → US Mountain TimeEST / MSTUS Eastern Time → US Pacific TimeEST / PSTUS Eastern Time → US Alaska TimeEST / AKSTUS Eastern Time → Hawaii TimeEST / HSTUS Eastern Time → Greenwich Mean TimeEST / GMTUS Eastern Time → India Standard TimeEST / ISTUS Eastern Time → China Standard TimeEST / CST
Need the exact current time?
Use the live ToolsHub timezone converter to see current times, DST status, and schedule across time zones.