Koster to Chicago time converter

Chicago is 7 hours behind Koster. When it is 9:00 AM in Koster, it is 2:00 AM in Chicago.

Koster SAST

Sunday, October 18, 2026

Chicago CDT

Sunday, October 18, 2026

Koster
South Africa
Sun, Oct 18
SASTUTC+2
Chicago
Illinois, United States
Sun, Oct 18
CDTUTC-5-7h
Finding your time zone…
Shared working hours (9:00–18:00)

Koster to Chicago conversion table

Every hour of today in Koster and the matching time in Chicago. Light rows are typical working hours (9:00–18:00).

KosterChicago
12:00 AM5:00 PM−1 day
1:00 AM6:00 PM−1 day
2:00 AM7:00 PM−1 day
3:00 AM8:00 PM−1 day
4:00 AM9:00 PM−1 day
5:00 AM10:00 PM−1 day
6:00 AM11:00 PM−1 day
7:00 AM12:00 AM
8:00 AM1:00 AM
9:00 AM2:00 AM
10:00 AM3:00 AM
11:00 AM4:00 AM
12:00 PM5:00 AM
1:00 PM6:00 AM
2:00 PM7:00 AM
3:00 PM8:00 AM
4:00 PM9:00 AM
5:00 PM10:00 AM
6:00 PM11:00 AM
7:00 PM12:00 PM
8:00 PM1:00 PM
9:00 PM2:00 PM
10:00 PM3:00 PM
11:00 PM4:00 PM

Best time to call or meet

Both sides are at work from 4:00 PM – 6:00 PM in Koster (9:00 AM – 11:00 AM in Chicago).

Daylight saving time and the difference

The difference changes during the year because Koster and Chicago switch clocks on different dates:

  • Oct 18, 2026 – Nov 1, 2026: -7h
  • Nov 1, 2026 – Mar 14, 2027: -8h
  • Mar 14, 2027 – Oct 18, 2027: -7h

Distance

Koster and Chicago are 13,868 km (8,617 miles) apart in a straight line.

More conversions

Chicago to KosterKoster to New YorkKoster to LondonKoster to Los AngelesKoster to TorontoKoster to São PauloKoster to ParisKoster to BerlinKoster to MoscowKoster to DubaiKoster to New DelhiKoster to BangkokKoster to Singapore
New York to ChicagoLondon to ChicagoLos Angeles to ChicagoToronto to ChicagoSão Paulo to ChicagoParis to ChicagoBerlin to ChicagoMoscow to ChicagoDubai to ChicagoNew Delhi to ChicagoBangkok to ChicagoSingapore to Chicago

Questions and answers

What is the time difference between Koster and Chicago?

Chicago is 7 hours behind Koster.

What time is it in Chicago when it is 9 AM in Koster?

When it is 9:00 AM in Koster, it is 2:00 AM in Chicago.

When is the best time to call Chicago from Koster?

Both sides are at work from 4:00 PM – 6:00 PM in Koster (9:00 AM – 11:00 AM in Chicago).

Does the time difference between Koster and Chicago change?

Yes, for part of the year, because daylight saving time starts and ends on different dates or applies on one side only.