What is the ISO week number in Mattoon?

TimeDials shows the current ISO week number for Mattoon 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 Mattoon observe daylight saving time (DST)?

Yes, Mattoon observes daylight saving time. The next clock change is on 2026-11-01 (clocks move back to GMT-6).

Time in Mattoon, Illinois, United States — Local Time & Date

Live

--:--:--

Current local time in 🇺🇸 Mattoon, Illinois, United States.

CST/CDT UTC-05:00

Relative to You

Detecting your timezone…

Relative to UTC

-5 hours behind

Noon here = 17:00 UTC

09:00 here = 14:00 UTC

12:00 here = 17:00 UTC

17:00 here = 22:00 UTC

ISO Week

11 Odd Week

Sun

07:07

18:40

Today

Mattoon is waking up — early risers grab coffee before the day begins. The current offset is UTC-05:00.

Daylight Saving Time

Last Clock Change

2026-03-08

Clocks moved forward to GMT-5

Next Clock Change

2026-11-01

Clocks will move back to GMT-6

Widget Creator

Add this Mattoon clock to your website

Customize a live Mattoon time widget — pick your style, colors, and layout, then copy one line of code.

Get this widget

Free embed — iframe, JavaScript, or direct link.

Quick Facts

Country	🇺🇸United States
State / Region	Illinois
Timezone	CST/CDT
UTC Offset	UTC-05:00
DST	Yes — daylight saving time observed
Population	18,113
Elevation	227 m
Sunrise	07:07
Sunset	18:40
Coordinates	39.48°N, -88.37°E

Map

Map data © OpenStreetMap contributors

Time Difference to Major Cities

City	Difference	Local Time
New York	+1h	--:--
Los Angeles	-2h	--:--
London	+5h	--:--
Paris	+6h	--:--
Dubai	+9h	--:--
Mumbai	+10h 30m	--:--
Singapore	+13h	--:--
Tokyo	+14h	--:--
Sydney	+16h	--:--
Sao Paulo	+2h	--:--
Cairo	+7h	--:--
Shanghai	+13h	--:--

Frequently Asked Questions

What are the business hours in Mattoon?

Standard business hours in Mattoon are 09:00–17:00 local time (CST/CDT). 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 Mattoon?

Mattoon is currently at UTC-05:00. The timezone identifier is CST/CDT. When it is noon in Mattoon, it is 17:00 UTC. You can embed a live Mattoon clock on your website.

What ISO week number is it in Mattoon?

It is currently ISO week 11 (odd week) in Mattoon. 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 Mattoon observe daylight saving time?

Yes, Mattoon observes daylight saving time (DST). The most recent change was on 2026-03-08, when clocks moved forward to GMT-5. The next change is on 2026-11-01, when clocks will move back to GMT-6.