ADT to EST Time Converter

Convert Atlantic Daylight Time (ADT) to Eastern Standard Time (EST). Both time zones are shown live below; current offset between them is 1 hour behind.

Halifax · Atlantic Daylight Time
21:20:28
Tuesday, May 12, 2026
ADT · UTC-03:00
New York · Eastern Standard Time
20:20:28
Tuesday, May 12, 2026
EDT · UTC-04:00

Convert a specific time

From: ADT (Halifax)
To: EST (New York)
--:--

Daylight Saving status right now

ADT (Atlantic Daylight Time)
Observes DST
Yes
In DST right now
Yes
Next fall back
2026-11-01
Offset shift
UTC-03:00 → UTC-04:00
EST (Eastern Standard Time)
Observes DST
Yes
In DST right now
Yes
Next fall back
2026-11-01
Offset shift
UTC-04:00 → UTC-05:00

When can ADT and EST meet?

00
01
02
03
04
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09
10
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ADT
EST
Both zones in working hours (9am-5pm)
One zone working
Off-hours
Columns are hours of the day in Halifax (ADT). Each row shows the local working-hours state in that zone for the same moment in time.
7 hours of overlap during standard 9am-5pm working hours.
Best meeting window: 10:00–16:00 ADT (09:00–15:00 EST).

Hour-by-hour ADT to EST conversion table

ADT time (Halifax)EST time (New York)Status
00:00 Tue23:00 MonOff-hours both sides
01:00 Tue00:00 TueOff-hours both sides
02:00 Tue01:00 TueOff-hours both sides
03:00 Tue02:00 TueOff-hours both sides
04:00 Tue03:00 TueOff-hours both sides
05:00 Tue04:00 TueOff-hours both sides
06:00 Tue05:00 TueOff-hours both sides
07:00 Tue06:00 TueOff-hours both sides
08:00 Tue07:00 TueOff-hours both sides
09:00 Tue08:00 TueADT working
10:00 Tue09:00 TueBoth at work
11:00 Tue10:00 TueBoth at work
12:00 Tue11:00 TueBoth at work
13:00 Tue12:00 TueBoth at work
14:00 Tue13:00 TueBoth at work
15:00 Tue14:00 TueBoth at work
16:00 Tue15:00 TueBoth at work
17:00 Tue16:00 TueEST working
18:00 Tue17:00 TueOff-hours both sides
19:00 Tue18:00 TueOff-hours both sides
20:00 Tue19:00 TueOff-hours both sides
21:00 Tue20:00 TueOff-hours both sides
22:00 Tue21:00 TueOff-hours both sides
23:00 Tue22:00 TueOff-hours both sides

Times computed for today in each zone using the IANA time zone database. The conversion accounts for daylight saving time wherever applicable.

About these time zones

Atlantic Daylight Time (ADT)
IANA identifier
America/Halifax
Current UTC offset
UTC-03:00
Current abbreviation
ADT
Major cities in this zone
Halifax
Eastern Standard Time (EST)
IANA identifier
America/New_York
Current UTC offset
UTC-04:00
Current abbreviation
EDT
Major cities in this zone
New YorkMiamiAtlantaBostonPhiladelphia

Sun today in Halifax and New York

New York
Sunrise
05:43
Sunset
20:04
Solar noon
12:53
Daylight
14h 20m

Related converters

EST to ADT (reverse)ADT to PSTADT to GMTADT to UTCADT to CETADT to ISTPST to ESTGMT to ESTUTC to ESTCET to ESTIST to EST
Looking for local time? See time in Halifax or time in New York.

Frequently asked questions

What is the time difference between ADT and EST right now?+
EST (Eastern Standard Time) is currently 1 hour behind ADT (Atlantic Daylight Time). The exact difference can change when one or both zones transition into or out of daylight saving time.
Does ADT or EST observe daylight saving time?+
ADT: observes daylight saving time. EST: observes daylight saving time.
When is the best time to schedule a meeting between ADT and EST?+
The strongest overlap is 10:00–16:00 ADT (09:00–15:00 EST), giving 7 hours when both sides are within standard 9am-5pm working hours.
What time is it in New York when it is 12:00 noon in Halifax?+
When it is 12:00 Tue in Halifax (ADT), it is 11:00 Tue in New York (EST).
Which IANA time zone identifiers are used for ADT and EST?+
ADT maps to "America/Halifax" in the IANA database. EST maps to "America/New_York". These identifiers are what most software libraries use to convert times accurately, including DST handling.
Is Halifax ahead of or behind New York?+
Whether Halifax (ADT) is ahead of or behind New York (EST) depends on the current UTC offsets. Right now EST is 1 hour behind ADT. The live converter and side-by-side clocks above always reflect the current direction.
What are the current UTC offsets for ADT and EST?+
ADT is UTC-03:00 (ADT) and EST is UTC-04:00 (EDT). Both offsets shift by one hour when the corresponding region enters or exits daylight saving time, so the live values on this page are the source of truth.
Can I schedule meetings during business hours for both ADT and EST?+
Yes. There are 7 hours of overlap during standard 9am-5pm working hours, with the strongest window at 10:00–16:00 ADT.