Though the wall-to-wall 2025 NCAA Tournament action won't get started until Thursday's first-round schedule, the First Four in Dayton has become a staple in its decade-plus of existence that provides a unique kickoff to March Madness.

Whether you're cheering for your favorite team or making a bracket for fun, here's what you need to know about March Madness 2025.

Millions of Americans are going through the annual March rite of filling out an NCAA Tournament bracket (or two or three).