1. On September 21, 1820, Tennessee's first constitution was adopted in Knoxville. This document established the structure and functions of government in the state and remained in effect until 1834.

2. Nashville's historic Ryman Auditorium opened its doors on September 21, 1892. Originally named the Union Gospel Tabernacle, the venue became known as the "Mother Church of Country Music" and hosted performances by musicians such as Bill Monroe, Hank Williams, and Patsy Cline.

3. On September 21, 1938, the Great New England Hurricane hit Tennessee, causing widespread damage and flooding. The storm, which originated in the Atlantic Ocean, was one of the deadliest and costliest in U.S. history.

4. The Tennessee Valley Authority (TVA) was formally established on September 21, 1933, as part of President Franklin D. Roosevelt's New Deal program. The TVA helped to modernize the state's electrical and transportation infrastructure, and its impact can still be seen today in the form of hydroelectric dams and other public works projects.

5. In 2003, Tennessee native Dolly Parton opened the Dollywood Foundation's Imagination Library, which provides free books to children from birth to age five. The program has expanded to numerous communities across the United States and other countries, with millions of books sent out each year on September 21 and throughout the year.