World Timezones

EST to AST-ATLANTIC Converter

Compare AST-ATLANTIC to EST instead
Eastern Time12:35 amFri, Jun 5
Eastern TimeEDT
North America · UTC-4
12:35 amFri, Jun 5
12a
1a
2a
3a
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8a
9a
10a
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12p
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6p
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8p
9p
10p
11p
Atlantic TimeADT
North America · UTC-3
1:35 amFri, Jun 5
1a
2a
3a
4a
5a
6a
7a
8a
9a
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11a
12p
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9p
10p
11p
12a

Offset

The time difference between Eastern Time and Atlantic Time is 1 hour.

1 hour

Eastern Time (EDT) is behind Atlantic Time (ADT).

EDT: UTC-4

ADT: UTC-3

Both zones are currently observing daylight saving time.

When to schedule

Business-hours overlap: 9 AM–4 PM in Eastern Time (10 AM–5 PM in Atlantic Time).

Both teams are in working hours during this window on weekdays.

Suggested time: 12:00 PM Eastern Time (1:00 PM Atlantic Time).

This window may shift by an hour during daylight saving time.

Public holidays in 2026

National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.

United States

  • New Year's DayThu, Jan 1
  • Martin Luther King, Jr. DayMon, Jan 19
  • Presidents DayMon, Feb 16
  • Memorial DayMon, May 25
  • Juneteenth National Independence DayFri, Jun 19
  • Independence DayFri, Jul 3
  • Labour DayMon, Sep 7
  • Columbus DayMon, Oct 12
  • Veterans DayWed, Nov 11
  • Thanksgiving DayThu, Nov 26
  • Christmas DayFri, Dec 25

Canada

  • New Year's DayThu, Jan 1
  • Good FridayFri, Apr 3
  • Victoria DayMon, May 18
  • Canada DayWed, Jul 1
  • Labour DayMon, Sep 7
  • National Day for Truth and ReconciliationWed, Sep 30
  • ThanksgivingMon, Oct 12
  • Christmas DayFri, Dec 25

About these zones

Eastern Time is also known as EST, or EDT. To call United States, dial +1.

Atlantic Time is also known as AST, or ADT. To call Canada, dial +1.

Atlantic Time is approximately 600 miles northeast of Eastern Time.

Quick reference

Full 24-hour conversion table — tap any time to open it in the converter.

ESTAST-ATLANTICDay
12:00 am1:00 amSame day
1:00 am2:00 amSame day
2:00 am3:00 amSame day
3:00 am4:00 amSame day
4:00 am5:00 amSame day
5:00 am6:00 amSame day
6:00 am7:00 amSame day
7:00 am8:00 amSame day
8:00 am9:00 amSame day
9:00 am10:00 amSame day
10:00 am11:00 amSame day
11:00 am12:00 pmSame day
12:00 pm1:00 pmSame day
1:00 pm2:00 pmSame day
2:00 pm3:00 pmSame day
3:00 pm4:00 pmSame day
4:00 pm5:00 pmSame day
5:00 pm6:00 pmSame day
6:00 pm7:00 pmSame day
7:00 pm8:00 pmSame day
8:00 pm9:00 pmSame day
9:00 pm10:00 pmSame day
10:00 pm11:00 pmSame day
11:00 pm12:00 am+1 day

Daylight saving time

Both Eastern Time and Atlantic Time observe daylight saving time and transition on the same date.

Next transition: Sunday, November 1, 2026 (fall back).

Because they transition simultaneously, the offset between these zones remains constant year-round.

See the daylight saving time page for transition dates across every time zone.

Daylight today

Eastern Time
Sunrise
5:27 AM
Sunset
8:24 PM
Day length
14h 58m
Atlantic Time
Sunrise
5:31 AM
Sunset
8:56 PM
Day length
15h 25m

Daylight overlap: 14h 30m — 5:27 AM–7:56 PM in Eastern Time (6:27 AM–8:56 PM in Atlantic Time). Both locations are in daylight during this window.

Cities in these zones

Cities in Atlantic Time

Browse all cities to see the current local time anywhere.

Airports in these zones

Airports in Eastern Time

  • EWR
  • HPN
  • JFK
  • LGA
  • TEB
  • ILG
  • PHL
  • TTN
  • CLT
  • USA

Airports in Atlantic Time

  • YHZ

Related conversions

Common conversions

What is 9:00 am EST in AST-ATLANTIC?
9:00 am EST is 10:00 am AST-ATLANTIC.
What is 12:00 pm EST in AST-ATLANTIC?
12:00 pm EST is 1:00 pm AST-ATLANTIC.
What is 12:30 pm EST in AST-ATLANTIC?
12:30 pm EST is 1:30 pm AST-ATLANTIC.
What is 2:00 pm EST in AST-ATLANTIC?
2:00 pm EST is 3:00 pm AST-ATLANTIC.
What is 5:00 pm EST in AST-ATLANTIC?
5:00 pm EST is 6:00 pm AST-ATLANTIC.
What is 11:30 pm EST in AST-ATLANTIC?
11:30 pm EST is 12:30 am AST-ATLANTIC, the next day.