The Cavs are still waiting to find out who the team will play in the Eastern Conference Finals.
The Celtics currently lead the series 3-1, Game 5 of the series is at 8 p.m. on May 9.
Game 1 and Game 2 will of the conference finals will be played in Boston or Philly, Game 3 and Game 4 will be played at Quicken Loans Arena.
Tickets for the Game 1 watch party, Game 2 watch party, Game 3 and Game 4 can be found on the team's website.
LeBron James has made it to the NBA Finals seven years in a row.
If the Celtics win Game 5 or 6 against the Sixers, Game 1 of the conference will be on Sunday. If the 76ers win the next three games against Boston, Game 1 of the conference finals will be on Tuesday.