IOT to CST Time Converter

Convert Indian Ocean Time (IOT) to Central Standard Time (CST). Both time zones are shown live below; current offset between them is 11 hours behind.

Diego Garcia · Indian Ocean Time
19:32:41
Monday, May 11, 2026
GMT+6 · UTC+06:00
Chicago · Central Standard Time
08:32:41
Monday, May 11, 2026
CDT · UTC-05:00

Convert a specific time

From: IOT (Diego Garcia)
To: CST (Chicago)
--:--

Daylight Saving status right now

IOT (Indian Ocean Time)
Observes DST
No
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

Heads up: CST observes DST while IOT does not. The 11-hour difference shown above will shift by one hour when CST starts or ends DST.

When can IOT and CST meet?

00
01
02
03
04
05
06
07
08
09
10
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IOT
CST
Both zones in working hours (9am-5pm)
One zone working
Off-hours
Columns are hours of the day in Diego Garcia (IOT). Each row shows the local working-hours state in that zone for the same moment in time.
No business-hours overlap exists between IOT and CST.
The two zones are too far apart for synchronous meetings during normal working hours. Plan async or schedule outside 9-5 on at least one side.

Hour-by-hour IOT to CST conversion table

IOT time (Diego Garcia)CST time (Chicago)Status
00:00 Mon13:00 SunCST working
01:00 Mon14:00 SunCST working
02:00 Mon15:00 SunCST working
03:00 Mon16:00 SunCST working
04:00 Mon17:00 SunOff-hours both sides
05:00 Mon18:00 SunOff-hours both sides
06:00 Mon19:00 SunOff-hours both sides
07:00 Mon20:00 SunOff-hours both sides
08:00 Mon21:00 SunOff-hours both sides
09:00 Mon22:00 SunIOT working
10:00 Mon23:00 SunIOT working
11:00 Mon00:00 MonIOT working
12:00 Mon01:00 MonIOT working
13:00 Mon02:00 MonIOT working
14:00 Mon03:00 MonIOT working
15:00 Mon04:00 MonIOT working
16:00 Mon05:00 MonIOT working
17:00 Mon06:00 MonOff-hours both sides
18:00 Mon07:00 MonOff-hours both sides
19:00 Mon08:00 MonOff-hours both sides
20:00 Mon09:00 MonCST working
21:00 Mon10:00 MonCST working
22:00 Mon11:00 MonCST working
23:00 Mon12:00 MonCST 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

Indian Ocean Time (IOT)
IANA identifier
Indian/Chagos
Current UTC offset
UTC+06:00
Current abbreviation
GMT+6
Major cities in this zone
Diego Garcia
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 Diego Garcia and Chicago

Chicago
Sunrise
05:35
Sunset
20:00
Solar noon
12:48
Daylight
14h 24m

Related converters

CST to IOT (reverse)IOT to ESTIOT to PSTIOT to GMTIOT to UTCIOT to CETEST to CSTPST to CSTGMT to CSTUTC to CSTCET to CST
Looking for local time? See time in Diego Garcia or time in Chicago.

Frequently asked questions

What is the time difference between IOT and CST right now?+
CST (Central Standard Time) is currently 11 hours behind IOT (Indian Ocean Time). The exact difference can change when one or both zones transition into or out of daylight saving time.
Does IOT or CST observe daylight saving time?+
IOT: does not observe daylight saving time. CST: observes daylight saving time.
When is the best time to schedule a meeting between IOT and CST?+
IOT and CST have no business-hour overlap, even at the edges of a typical workday. Async collaboration or non-9-5 scheduling is the practical choice.
What time is it in Chicago when it is 12:00 noon in Diego Garcia?+
When it is 12:00 Mon in Diego Garcia (IOT), it is 01:00 Mon in Chicago (CST).
Which IANA time zone identifiers are used for IOT and CST?+
IOT maps to "Indian/Chagos" 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 Diego Garcia ahead of or behind Chicago?+
Whether Diego Garcia (IOT) is ahead of or behind Chicago (CST) depends on the current UTC offsets. Right now CST is 11 hours behind IOT. The live converter and side-by-side clocks above always reflect the current direction.
What are the current UTC offsets for IOT and CST?+
IOT is UTC+06:00 (GMT+6) 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 IOT and CST?+
No standard business-hours overlap exists between IOT and CST. Plan asynchronous work or schedule outside 9-5 on at least one side.