MAINx24 is always held on the first Saturday of December. The next event falls on December 6, 2025.

MAINx24 is a 24-hour long festival celebrating Main Street and the surrounding Southside, held every December since 2007. The annual event features programming all day long, from parades to music to poetry readings to chili cook-offs. The day has been a way to celebrate and showcase the burgeoning Southside. MAINx24 is organized completely by residents, merchants, and friends of the Southside community.

Behind MAINx24 is an audacious dream: make Chattanooga a 24-hour city.