Oklahoma Day is a state holiday in Oklahoma, United States of America, observed annually on April 22nd. This holiday was officially established by the Oklahoma legislature in 1929, to commemorate the date of the "Land Run" in 1889 that led to the settlement of Oklahoma territory. The government designated this day to honor the rich and diverse history of the state, and to celebrate its complex past that shaped its present identity.

During Oklahoma Day, various festive events and activities are held in schools, communities, and public places across the state. These usually include history-focused lessons in schools, parades, art displays, traditional music, and dance performances that reflect the state's diverse cultural heritage. It's an opportunity for residents to remember the pioneers who began the journey of this state, Native American cultures, and teachings and the influences and contributions of various migrant communities who call Oklahoma home.

While it is not a public holiday in the sense that offices and businesses remain open, Oklahoma Day is a day of pride for Oklahomans. It serves as a reminder of the resilience, courage, and spirit of their forefathers. Educational establishments particularly emphasize the importance of this day, teaching the younger generation about their state's history so that they can appreciate their roots.