1. In 1911, the Oklahoma Central Railroad officially changed its name to the Oklahoma City-Ada-Atoka Railroad. This railway line was crucial in the growth and development of many small communities throughout Oklahoma.

2. On January 15, 1936, the first tractor trailer rig drove through the new Turner Turnpike toll road in Oklahoma. This turnpike was one of the first in the United States and provided faster transportation between Tulsa and Oklahoma City.

3. In 1971, the Tulsa City-County Library System began offering a unique service to its patrons - a phone-in timeline of daily news headlines. This service was popular among Tulsa residents and continued until the rise of the internet made it obsolete.

4. On this day in 1986, the Oklahoma State Board of Education approved a plan to require high school students to pass a citizenship test before graduating. This requirement was designed to promote civic education and ensure that students had a basic understanding of American history and government.

5. In 2010, Norman, Oklahoma became the first city in the state to enact a ban on smoking in all public places, including bars and restaurants. This was a significant milestone for public health advocates in Oklahoma and set the stage for similar smoking bans in other cities and towns throughout the state.