What is the ISO week number in Hennef (Sieg)?

TimeDials shows the current ISO week number for Hennef (Sieg) in real time. ISO week numbers follow the ISO 8601 standard, where week 1 is the week containing the first Thursday of the year.

Does Hennef (Sieg) observe daylight saving time (DST)?

Yes, Hennef (Sieg) observes daylight saving time. The next clock change is on 2026-03-29 (clocks move forward to GMT+2).

Time in Hennef (Sieg), North Rhine-Westphalia, Germany — Local Time & Date

Live

--:--:--

Current local time in 🇩🇪 Hennef (Sieg), North Rhine-Westphalia, Germany.

CET/CEST UTC+01:00

Relative to You

Detecting your timezone…

Relative to UTC

+1 hours ahead

Noon here = 11:00 UTC

09:00 here = 08:00 UTC

12:00 here = 11:00 UTC

17:00 here = 16:00 UTC

ISO Week

11 Odd Week

Sun

06:51

18:11

Today

Mid-morning in Hennef (Sieg). Offices are busy, meetings are underway. The current offset is UTC+01:00.

Daylight Saving Time

Last Clock Change

2025-10-26

Clocks moved back to GMT+1

Next Clock Change

2026-03-29

Clocks will move forward to GMT+2

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Quick Facts

Country	🇩🇪Germany
State / Region	North Rhine-Westphalia
Timezone	CET/CEST
UTC Offset	UTC+01:00
DST	Yes — daylight saving time observed
Population	48,002
Elevation	70 m
Sunrise	06:51
Sunset	18:11
Coordinates	50.78°N, 7.28°E

Map

Map data © OpenStreetMap contributors

Time Difference to Major Cities

City	Difference	Local Time
New York	-5h	--:--
Los Angeles	-8h	--:--
London	-1h	--:--
Paris	+0h	--:--
Dubai	+3h	--:--
Mumbai	+4h 30m	--:--
Singapore	+7h	--:--
Tokyo	+8h	--:--
Sydney	+10h	--:--
Sao Paulo	-4h	--:--
Cairo	+1h	--:--
Shanghai	+7h	--:--

Frequently Asked Questions

What are the business hours in Hennef (Sieg)?

Standard business hours in Hennef (Sieg) are 09:00–17:00 local time (CET/CEST). Check the live clock above to see the current local time. Use our Time Zone Planner to find the best meeting time across cities.

What is the UTC offset for Hennef (Sieg)?

Hennef (Sieg) is currently at UTC+01:00. The timezone identifier is CET/CEST. When it is noon in Hennef (Sieg), it is 11:00 UTC. You can embed a live Hennef (Sieg) clock on your website.

What ISO week number is it in Hennef (Sieg)?

It is currently ISO week 11 (odd week) in Hennef (Sieg). ISO week numbers follow the ISO 8601 standard, where week 1 is the week containing the first Thursday of the year. Learn more about ISO week numbers.

Does Hennef (Sieg) observe daylight saving time?

Yes, Hennef (Sieg) observes daylight saving time (DST). The most recent change was on 2025-10-26, when clocks moved back to GMT+1. The next change is on 2026-03-29, when clocks will move forward to GMT+2.