1. The first St. Patrick's Day parade in Oklahoma City was held in 1891, making it one of the oldest St. Patrick's Day parades in the United States. It is now a major event in the city, drawing thousands of participants and spectators.

2. In 1910, the Oklahoma legislature passed a law making it illegal to wear green or any other color associated with St. Patrick's Day. The law was repealed in 1924 after protests from Irish-Americans and others.

3. In 1937, a group of Irish-American businessmen founded the Irish-American Club of Tulsa, which has been a leading cultural and social organization in the state for over 80 years. The club sponsors many events throughout the year, including a St. Patrick's Day parade and celebration.

4. In 1949, Oklahoma City hosted the first ever World Championship Cow Chip Throwing Contest on St. Patrick's Day. The event, which involves throwing a dried cow patty as far as possible, continues to be held each year and draws thousands of spectators.

5. In 1978, the Oklahoma State Senate passed a resolution recognizing St. Patrick's Day as an official state holiday. While it is not a legal holiday, many businesses and schools in the state choose to close or hold special events in honor of the day.