1. On December 28, 1906, Oklahoma was officially admitted as the 46th state of the United States. The territory had been established in 1890, and after years of advocacy, Oklahoma's statehood was finally granted.

2. The Oklahoma City bombing trial began on December 28, 1997. Timothy McVeigh had been arrested in 1995 for his role in the devastating terrorist attack that had taken place in April of that year, killing 168 people. The trial would ultimately end with McVeigh being sentenced to death.

3. In 2004, on December 28, Oklahoma quarterback and future NFL star Sam Bradford was born. Bradford would go on to lead the Sooners to the BCS National Championship Game in 2009 and eventually be drafted first overall by the St. Louis Rams in the 2010 NFL Draft.

4. On December 28, 1924, the Oklahoma City Zoo officially opened its doors to the public. Initially housing just a few animals, the zoo has since grown to become a major attraction in the state, with over 1,800 animals from 500 different species.

5. The town of Henryetta, Oklahoma, was founded on December 28, 1900. The town was named in honor of Henry Clay Frick, a wealthy industrialist and philanthropist with interests in Oklahoma's coal industry. Today, the town is known for its annual Labor Day weekend celebration, which includes a rodeo and other events.