1. Statehood Day: October 1, 1907, marks the day that Oklahoma officially became the 46th state in the United States of America.

2. First Oklahoma Governor: Charles Nathaniel Haskell became the first governor of Oklahoma on October 1, 1907. He was a prominent businessman and political leader who played a key role in the state's early development.

3. Land Run: On October 1, 1893, the Cherokee Outlet land run took place, opening up approximately six million acres of land to homesteaders. This was one of the last major land runs in Oklahoma.

4. National Parks: On October 1, 1976, Congress established the Chickasaw National Recreation Area in Davis, Oklahoma. The park features natural springs, lakes, and hiking trails. Additionally, the Oklahoma City National Memorial Museum opened to the public on October 1, 2001, honoring the 168 people who lost their lives in the 1995 bombing of the Alfred P. Murrah Federal Building.

5. Aviation History: On October 1, 1941, Douglas Aircraft Company's Tulsa plant produced its first C-47 transport aircraft. During World War II, the plant played a major role in producing military planes, including the famous B-24 Liberator bomber.