Pre-Tournament Events
March 14: Teams Announced @ 5:00 PM [CST] on CBS
March 18: Four Play-In Games
March 19: Entry Deadline @ 11:30 AM [CST]

First Weekend Of The Tournament
March 19-20: Round One - 64 Teams
March 21-22: Round Two - 32 Teams

Second Weekend Of Games
March 27-28: Round Three - 16 Teams
March 29-30: Round Four - 8 Teams

Championship Weekend
April 3: Round Five - Semi-Finals - 4 Teams
April 5: Round Six - Championship - 2 Teams

NCAA Division I Men's Tournament Dates (2021).
Retrieved from https://www.ncaa.com/march-madness/schedule