CST to ADT Time Converter

Convert Central Standard Time (CST) to Atlantic Daylight Time (ADT). Both time zones are shown live below; current offset between them is 2 hours ahead.

Chicago · Central Standard Time
18:18:03
Tuesday, May 12, 2026
CDT · UTC-05:00
Halifax · Atlantic Daylight Time
20:18:03
Tuesday, May 12, 2026
ADT · UTC-03:00

Convert a specific time

From: CST (Chicago)
To: ADT (Halifax)
--:--

Daylight Saving status right now

CST (Central Standard Time)
Observes DST
Yes
In DST right now
Yes
Next fall back
2026-11-01
Offset shift
UTC-05:00 → UTC-06:00
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

When can CST and ADT meet?

00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
CST
ADT
Both zones in working hours (9am-5pm)
One zone working
Off-hours
Columns are hours of the day in Chicago (CST). Each row shows the local working-hours state in that zone for the same moment in time.
6 hours of overlap during standard 9am-5pm working hours.
Best meeting window: 09:00–14:00 CST (11:00–16:00 ADT).

Hour-by-hour CST to ADT conversion table

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

Central Standard Time (CST)
IANA identifier
America/Chicago
Current UTC offset
UTC-05:00
Current abbreviation
CDT
Major cities in this zone
ChicagoHoustonDallasAustinNew Orleans
Atlantic Daylight Time (ADT)
IANA identifier
America/Halifax
Current UTC offset
UTC-03:00
Current abbreviation
ADT
Major cities in this zone
Halifax

Sun today in Chicago and Halifax

Chicago
Sunrise
05:34
Sunset
20:01
Solar noon
12:48
Daylight
14h 26m

Related converters

ADT to CST (reverse)CST to ESTCST to PSTCST to GMTCST to UTCCST to CETEST to ADTPST to ADTGMT to ADTUTC to ADTCET to ADT
Looking for local time? See time in Chicago or time in Halifax.

Frequently asked questions

What is the time difference between CST and ADT right now?+
ADT (Atlantic Daylight Time) is currently 2 hours ahead CST (Central Standard Time). The exact difference can change when one or both zones transition into or out of daylight saving time.
Does CST or ADT observe daylight saving time?+
CST: observes daylight saving time. ADT: observes daylight saving time.
When is the best time to schedule a meeting between CST and ADT?+
The strongest overlap is 09:00–14:00 CST (11:00–16:00 ADT), giving 6 hours when both sides are within standard 9am-5pm working hours.
What time is it in Halifax when it is 12:00 noon in Chicago?+
When it is 12:00 Tue in Chicago (CST), it is 14:00 Tue in Halifax (ADT).
Which IANA time zone identifiers are used for CST and ADT?+
CST maps to "America/Chicago" in the IANA database. ADT maps to "America/Halifax". These identifiers are what most software libraries use to convert times accurately, including DST handling.
Is Chicago ahead of or behind Halifax?+
Whether Chicago (CST) is ahead of or behind Halifax (ADT) depends on the current UTC offsets. Right now ADT is 2 hours ahead CST. The live converter and side-by-side clocks above always reflect the current direction.
What are the current UTC offsets for CST and ADT?+
CST is UTC-05:00 (CDT) and ADT is UTC-03:00 (ADT). 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 CST and ADT?+
Yes. There are 6 hours of overlap during standard 9am-5pm working hours, with the strongest window at 09:00–14:00 CST.