CST to CHAST Time Converter

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

Chicago · Central Standard Time
07:00:24
Wednesday, May 13, 2026
CDT · UTC-05:00
Chatham Islands · Chatham Standard Time
00:45:24
Thursday, May 14, 2026
GMT+12:45 · UTC+12:45

Convert a specific time

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

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
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

When can CST and CHAST 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
CHAST
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.
1 hour of overlap during standard 9am-5pm working hours.
Best meeting window: 16:00–16:00 CST (09:45–09:45 CHAST).

Hour-by-hour CST to CHAST conversion table

CST time (Chicago)CHAST time (Chatham Islands)Status
00:00 Wed17:45 WedOff-hours both sides
01:00 Wed18:45 WedOff-hours both sides
02:00 Wed19:45 WedOff-hours both sides
03:00 Wed20:45 WedOff-hours both sides
04:00 Wed21:45 WedOff-hours both sides
05:00 Wed22:45 WedOff-hours both sides
06:00 Wed23:45 WedOff-hours both sides
07:00 Wed00:45 ThuOff-hours both sides
08:00 Wed01:45 ThuOff-hours both sides
09:00 Wed02:45 ThuCST working
10:00 Wed03:45 ThuCST working
11:00 Wed04:45 ThuCST working
12:00 Wed05:45 ThuCST working
13:00 Wed06:45 ThuCST working
14:00 Wed07:45 ThuCST working
15:00 Wed08:45 ThuCST working
16:00 Wed09:45 ThuBoth at work
17:00 Wed10:45 ThuCHAST working
18:00 Wed11:45 ThuCHAST working
19:00 Wed12:45 ThuCHAST working
20:00 Wed13:45 ThuCHAST working
21:00 Wed14:45 ThuCHAST working
22:00 Wed15:45 ThuCHAST working
23:00 Wed16:45 ThuCHAST working

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
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

Sun today in Chicago and Chatham Islands

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

Related converters

CHAST to CST (reverse)CST to ESTCST to PSTCST to GMTCST to UTCCST to CETEST to CHASTPST to CHASTGMT to CHASTUTC to CHASTCET to CHAST
Looking for local time? See time in Chicago or time in Chatham Islands.

Frequently asked questions

What is the time difference between CST and CHAST right now?+
CHAST (Chatham Standard Time) is currently 17h 45m 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 CHAST observe daylight saving time?+
CST: observes daylight saving time. CHAST: observes daylight saving time.
When is the best time to schedule a meeting between CST and CHAST?+
The strongest overlap is 16:00–16:00 CST (09:45–09:45 CHAST), giving 1 hour when both sides are within standard 9am-5pm working hours.
What time is it in Chatham Islands when it is 12:00 noon in Chicago?+
When it is 12:00 Wed in Chicago (CST), it is 05:45 Thu in Chatham Islands (CHAST).
Which IANA time zone identifiers are used for CST and CHAST?+
CST maps to "America/Chicago" in the IANA database. CHAST maps to "Pacific/Chatham". These identifiers are what most software libraries use to convert times accurately, including DST handling.
Is Chicago ahead of or behind Chatham Islands?+
Whether Chicago (CST) is ahead of or behind Chatham Islands (CHAST) depends on the current UTC offsets. Right now CHAST is 17h 45m 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 CHAST?+
CST is UTC-05:00 (CDT) and CHAST is UTC+12:45 (GMT+12:45). 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 CHAST?+
Yes. There are 1 hour of overlap during standard 9am-5pm working hours, with the strongest window at 16:00–16:00 CST.