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

UTC Offset Reference

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

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

Standard Time Conversion (ESTAST)

US Eastern TimeCanada Atlantic Time
12:00 AM EST1:00 AM AST
6:00 AM EST7:00 AM AST
9:00 AM EST10:00 AM AST
12:00 PM EST1:00 PM AST
3:00 PM EST4:00 PM AST
6:00 PM EST7:00 PM AST
9:00 PM EST10:00 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.

Need the exact current time?

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

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