CHAST to CST Time Converter

Convert Chatham Standard Time (CHAST) to Central Standard Time (CST). Both time zones are shown live below; current offset between them is 17h 45m behind.

Chatham Islands · Chatham Standard Time
23:52:40
Wednesday, May 13, 2026
GMT+12:45 · UTC+12:45
Chicago · Central Standard Time
06:07:40
Wednesday, May 13, 2026
CDT · UTC-05:00

Convert a specific time

From: CHAST (Chatham Islands)
To: CST (Chicago)
--:--

Daylight Saving status right now

CHAST (Chatham Standard Time)
Observes DST
Yes
In DST right now
No
Next spring forward
2026-09-27
Offset shift
UTC+12:45 → UTC+13:45
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

When can CHAST and CST meet?

00
01
02
03
04
05
06
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08
09
10
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13
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15
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18
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23
CHAST
CST
Both zones in working hours (9am-5pm)
One zone working
Off-hours
Columns are hours of the day in Chatham Islands (CHAST). Each row shows the local working-hours state in that zone for the same moment in time.
2 hours of overlap during standard 9am-5pm working hours.
Best meeting window: 09:00–10:00 CHAST (15:15–16:15 CST).

Hour-by-hour CHAST to CST conversion table

CHAST time (Chatham Islands)CST time (Chicago)Status
00:00 Wed06:15 TueOff-hours both sides
01:00 Wed07:15 TueOff-hours both sides
02:00 Wed08:15 TueOff-hours both sides
03:00 Wed09:15 TueCST working
04:00 Wed10:15 TueCST working
05:00 Wed11:15 TueCST working
06:00 Wed12:15 TueCST working
07:00 Wed13:15 TueCST working
08:00 Wed14:15 TueCST working
09:00 Wed15:15 TueBoth at work
10:00 Wed16:15 TueBoth at work
11:00 Wed17:15 TueCHAST working
12:00 Wed18:15 TueCHAST working
13:00 Wed19:15 TueCHAST working
14:00 Wed20:15 TueCHAST working
15:00 Wed21:15 TueCHAST working
16:00 Wed22:15 TueCHAST working
17:00 Wed23:15 TueOff-hours both sides
18:00 Wed00:15 WedOff-hours both sides
19:00 Wed01:15 WedOff-hours both sides
20:00 Wed02:15 WedOff-hours both sides
21:00 Wed03:15 WedOff-hours both sides
22:00 Wed04:15 WedOff-hours both sides
23:00 Wed05:15 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

Chatham Standard Time (CHAST)
IANA identifier
Pacific/Chatham
Current UTC offset
UTC+12:45
Current abbreviation
GMT+12:45
Major cities in this zone
Chatham Islands
Central Standard Time (CST)
IANA identifier
America/Chicago
Current UTC offset
UTC-05:00
Current abbreviation
CDT
Major cities in this zone
ChicagoHoustonDallasAustinNew Orleans

Sun today in Chatham Islands and Chicago

Chicago
Sunrise
05:33
Sunset
20:02
Solar noon
12:48
Daylight
14h 28m

Related converters

CST to CHAST (reverse)CHAST to ESTCHAST to PSTCHAST to GMTCHAST to UTCCHAST to CETEST to CSTPST to CSTGMT to CSTUTC to CSTCET to CST
Looking for local time? See time in Chatham Islands or time in Chicago.

Frequently asked questions

What is the time difference between CHAST and CST right now?+
CST (Central Standard Time) is currently 17h 45m behind CHAST (Chatham Standard Time). The exact difference can change when one or both zones transition into or out of daylight saving time.
Does CHAST or CST observe daylight saving time?+
CHAST: observes daylight saving time. CST: observes daylight saving time.
When is the best time to schedule a meeting between CHAST and CST?+
The strongest overlap is 09:00–10:00 CHAST (15:15–16:15 CST), giving 2 hours when both sides are within standard 9am-5pm working hours.
What time is it in Chicago when it is 12:00 noon in Chatham Islands?+
When it is 12:00 Wed in Chatham Islands (CHAST), it is 18:15 Tue in Chicago (CST).
Which IANA time zone identifiers are used for CHAST and CST?+
CHAST maps to "Pacific/Chatham" in the IANA database. CST maps to "America/Chicago". These identifiers are what most software libraries use to convert times accurately, including DST handling.
Is Chatham Islands ahead of or behind Chicago?+
Whether Chatham Islands (CHAST) is ahead of or behind Chicago (CST) depends on the current UTC offsets. Right now CST is 17h 45m behind CHAST. The live converter and side-by-side clocks above always reflect the current direction.
What are the current UTC offsets for CHAST and CST?+
CHAST is UTC+12:45 (GMT+12:45) and CST is UTC-05:00 (CDT). 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 CHAST and CST?+
Yes. There are 2 hours of overlap during standard 9am-5pm working hours, with the strongest window at 09:00–10:00 CHAST.