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National Illinois Day

Celebrate National Illinois Day with a trip to the Prairie State - explore its breathtaking landscapes and charming towns!

Monday

December 2026

Last updated February 7, 2026 · by the Holiday Calendar Team

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YEARLY DATEDecember 7

OBSERVED INUnited States

CATEGORYCulture

SUBCATEGORYRegional

INTRO

Introduction

PHOTO

Celebrate the wonderful state of Illinois on December 7th with National Illinois Day! This special day was first established in 1984 as a way to recognize and honor the rich history, culture, and contributions that this great state has made over the years. From its diverse population, to its amazing landmarks and attractions, there is so much to celebrate on this day! Whether you're an Illinois native or just visiting for the day, get ready to show your pride and enjoy all the unique experiences this beautiful state has to offer.

TIMELINE

National Illinois Day Timeline

Statehood for Illinois

On December 3, Illinois was admitted as the 21st state of the United States.

Springfield Becomes State Capital

Springfield became the state capital, replacing Vandalia, thanks largely to the efforts of a young state legislator named Abraham Lincoln.

Beginning of the Windy City

The city of Chicago was incorporated, eventually becoming the most populous city in Illinois and the third most populous city in the U.S.

"A Century of Progress"

The Century of Progress International Exposition, also known as the World's Fair, was held in Chicago, showcasing innovations and advancements.

Birth of Sears Tower

Construction was commenced on the Sears Tower, once the world's tallest building and an iconic part of Chicago's skyline.

National Illinois Day Initiated

National Illinois Day was first established to celebrate the history, culture, and contributions of Illinois.

GET INVOLVED

How to Celebrate National Illinois Day

Visit an Illinois landmark

Take a day to visit one of Illinois’ many historic landmarks. From the Abraham Lincoln Presidential Library and Museum to Shawnee National Forest, there are a variety of sites to explore.

TRY

Try some Illinois cuisine

From Chicago-style hot dogs to deep dish pizza, there are a variety of iconic dishes that are popular in Illinois. Take the opportunity to sample some of the state’s most beloved dishes.

WATCH

Watch a movie set in Illinois

Take a trip to the movies and watch a movie set in Illinois. From “Ferris Bueller’s Day Off” to “The Blues Brothers,” there are a variety of great films that feature the state as a backdrop.

ATTEND

Attend an Illinois festival

Illinois is home to a variety of festivals throughout the year, from Blues Fest in Chicago to the Sweet Corn Festival in Mount Carroll. Check out what’s happening in your area and join in on the fun.

Go shopping in an Illinois mall

Illinois is home to several great malls, from Northbrook Court to Oakbrook Center. Take the opportunity to do some shopping and explore all that the state has to offer.

WHY THIS DAY MATTERS

Why National Illinois Day is Important

Illinois is home to incredible people

The people of Illinois are some of the most remarkable in the world. They are resilient, passionate, and hardworking. They strive to make their state better each and every day, which makes National Illinois Day so important - it's a time to come together celebrate their achievements!

Illinois has a rich history

National Illinois Day is an important reminder that the state of Illinois has been blessed with a long and vibrant history. From the first Native Americans to the famous settlers who discovered the Land of Lincoln, Illinois has a unique culture and heritage that needs to be celebrated and remembered.

Illinois is a great place to live

From its amazing cities like Chicago and Springfield to its charming small towns, Illinois is an incredible place to live and work. There's always something new to explore and discover in this beautiful state. Whether you're enjoying some deep dish pizza or exploring one of its gorgeous national parks, there's something for everyone in Illinois!