Chicago to Hennef (Sieg) time converter

Hennef (Sieg) is 7 hours ahead of Chicago. When it is 9:00 AM in Chicago, it is 4:00 PM in Hennef (Sieg).

Chicago CDT

Monday, October 19, 2026

Hennef (Sieg) CEST

Monday, October 19, 2026

Chicago
Illinois, United States
Mon, Oct 19
CDTUTC-5
Hennef (Sieg)
Germany
Mon, Oct 19
CESTUTC+2+7h
Finding your time zone…
Shared working hours (9:00–18:00)

Chicago to Hennef (Sieg) conversion table

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

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

Best time to call or meet

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

Daylight saving time and the difference

The difference changes during the year because Chicago and Hennef (Sieg) switch clocks on different dates:

  • Oct 19, 2026 – Oct 24, 2026: +7h
  • Oct 24, 2026 – Nov 1, 2026: +6h
  • Nov 1, 2026 – Mar 14, 2027: +7h
  • Mar 14, 2027 – Mar 27, 2027: +6h
  • Mar 27, 2027 – Oct 19, 2027: +7h

Distance

Chicago and Hennef (Sieg) are 6,844 km (4,253 miles) apart in a straight line.

More conversions

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Questions and answers

What is the time difference between Chicago and Hennef (Sieg)?

Hennef (Sieg) is 7 hours ahead of Chicago.

What time is it in Hennef (Sieg) when it is 9 AM in Chicago?

When it is 9:00 AM in Chicago, it is 4:00 PM in Hennef (Sieg).

When is the best time to call Hennef (Sieg) from Chicago?

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

Does the time difference between Chicago and Hennef (Sieg) change?

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