March Madness 2026 effectively starts Tuesday, March 17, 2026 , with the First Four games in Dayton, Ohio.

If you mean the very first official moment of the tournament, some outlets treat Selection Sunday — Sunday, March 15, 2026, when the 68‑team bracket is revealed — as the start of March Madness.

Quick Scoop: Key Dates for March Madness 2026

  • Selection Sunday (bracket reveal): Sunday, March 15, 2026.
  • First Four (games begin – “true” on‑court start): Tuesday–Wednesday, March 17–18, 2026, in Dayton.
  • First round (full 64‑team bracket in action): Thursday–Friday, March 19–20, 2026.

So depending on how you phrase “what day does March Madness start”:

  • Many fans say March 17, 2026 (tip‑off of the First Four).
  • TV promos and news often spotlight March 15, 2026 as the “start” because that’s when the bracket and chaos are officially unleashed.

Tiny Story Snapshot

Picture this: It’s Sunday night, March 15, 2026. Fans are glued to their screens as the Selection Show reveals who’s in, who’s out, and which bubble teams had their hearts broken.

Within 48 hours, on Tuesday, March 17 , the First Four tips in Dayton, and suddenly every possession feels like life or death for those bubble squads trying to turn “barely in” into “Cinderella.”

Mini FAQ

  1. What day does March Madness start in 2026?
    • Bracket/start of “Madness”: Sunday, March 15, 2026 (Selection Sunday).
 * First games played: **Tuesday, March 17, 2026** (First Four).
  1. When does the main 64‑team bracket start?
    • Thursday, March 19, 2026.

Information gathered from public forums or data available on the internet and portrayed here.