Skip to main content
ToolsHub

Canada Atlantic Time to US Eastern Time

Convert times between Canada Atlantic Time (AST, UTC-4:00) and US Eastern Time (EST, UTC-5:00). US Eastern Time is 1 hour behind Canada Atlantic Time in standard time.

UTC-4:00 / -3:00UTC-5:00 / -4:00
Live timezone converter

UTC Offset Reference

TimezoneAbbreviationStandard offsetDST offsetCountry
Canada Atlantic TimeAST / ADTUTC-4:00UTC-3:00Canada
US Eastern TimeEST / EDTUTC-5:00UTC-4:00United States

* DST offset applies during summer months. Exact transition dates vary by year.

Standard Time Conversion (ASTEST)

Canada Atlantic TimeUS Eastern Time
12:00 AM AST11:00 PM (prev day) EST
6:00 AM AST5:00 AM EST
9:00 AM AST8:00 AM EST
12:00 PM AST11:00 AM EST
3:00 PM AST2:00 PM EST
6:00 PM AST5:00 PM EST
9:00 PM AST8:00 PM EST

Daylight Saving Time (DST) Notes

  • Canada Atlantic Time observes DST. Clocks advance 1 hour to ADT (UTC-3:00) roughly from month 3 to 11.
  • US Eastern Time observes DST. Clocks advance 1 hour to EDT (UTC-4:00) roughly from month 3 to 11.

Frequently Asked Questions

How do I convert AST to EST?
Add (-1) hours to the AST time to get EST. For example, 9:00 AM AST = 8:00 AM EST.
What is the current UTC offset for Canada Atlantic Time?
Canada Atlantic Time is UTC-4:00 during standard time (AST) and UTC-3:00 during summer daylight saving time (ADT).
Is US Eastern Time ahead or behind Canada Atlantic Time?
US Eastern Time is 1 hour behind Canada Atlantic Time in standard time.
When is a good time to schedule a meeting between AST and EST?
A good overlap window is around 12:00 PM AST / 11:00 AM EST, which falls within business hours for both timezones.

Need the exact current time?

Use the live ToolsHub timezone converter to see current times, DST status, and schedule across time zones.

Open live converter →