1. On June 3, 1822, the Choctaw Nation signed the Treaty of Washington City with the United States government, ceding their lands in Mississippi and Alabama in exchange for new lands in Indian Territory, which would later become Oklahoma.

2. June 3, 1918, marked the deadliest tornado in Oklahoma history, the Woodward Tornado, which killed over 100 people and destroyed much of the city of Woodward.

3. On June 3, 1924, the first public radio station in Oklahoma, KTUL, began broadcasting in Tulsa. It was originally owned by the Tulsa World newspaper.

4. The Will Rogers Stampede PRCA Rodeo, the oldest annual rodeo in Oklahoma, takes place each year in the town of Claremore during the first weekend in June, with events kicking off on June 3.

5. June 3, 2009, was declared the official "Oklahoma Centennial Farm Day" by Governor Brad Henry, recognizing and honoring families who have owned and operated their farms for over 100 years in the state of Oklahoma.