1. Statehood Bill Passed - On February 15, 1906, the Enabling Act was passed by the U.S. Congress, which laid the groundwork for Oklahoma to become a state. The bill provided for the framework of state government and authorized a convention to write a constitution for the proposed state.

2. The Flag Adopted - On February 15, 1925, the Oklahoma Legislature adopted a new state flag. The flag featured an Osage warrior's shield with the state motto, "Labor omnia vincit" (Labor conquers all things), emblazoned across it. The blue field of the flag represented devotion, and the shield was an emblem of defensive or protective warfare.

3. Tornado Outbreak - On February 15, 1969, a devastating tornado outbreak occurred in Oklahoma. It was part of a larger weather system that produced over 100 tornadoes across the midwestern United States. In Oklahoma, the tornadoes caused significant damage and loss of life in several communities, including Woodward and Sayre.

4. Tragedy at Will Rogers World Airport - On February 15, 2001, an airplane carrying a NASCAR racing team crashed during takeoff at Will Rogers World Airport in Oklahoma City. All ten people aboard the plane were killed. The tragedy shocked the racing community and led to increased safety measures at NASCAR events.

5. The Land Run - On February 15, 1897, the third and final land run occurred in Oklahoma. This was the opening of the Cheyenne and Arapaho lands, as vast tracts of land were opened to settlers in Oklahoma. Thousands of hopeful settlers raced to stake their claims, which resulted in the rapid growth and development of numerous towns and cities throughout the region.