1. On September 15, 1963, a bomb exploded at the 16th Street Baptist Church in Birmingham, Alabama, killing four African American girls. The tragic event served as a catalyst for the Civil Rights movement in the South, including Mississippi.

2. Mississippi has a strong agricultural industry, and September 15 marks the beginning of National Hispanic Heritage Month, which recognizes the contributions of Hispanic and Latinx workers to American agriculture.

3. On September 15, 1810, the Girod-Morgan Expedition, led by French botanist André Michaux and American physician Samuel Mitchell, explored the Yazoo River and documented the flora and fauna of the region.

4. Mississippi is known for its rich musical heritage, and September 15 has been designated as Mississippi Blues Trail marker unveiling day. The Mississippi Blues Trail is a series of historic markers that commemorate notable blues performers and locations throughout the state.

5. September 15 is also the birthday of Mississippi-born author and Pulitzer Prize winner Eudora Welty. Welty's works, including "A Worn Path" and "The Optimist's Daughter," are celebrated for their vivid depictions of Southern life and culture.