While the NBA playoffs begin on Saturday, April 16, we'll have to wait until Sunday, April 17 for the Pistons' series with the Cavaliers to tip off. As many noted in the comments, there is an event already planned at Quicken Loans Arena on Saturday, so that's likely why they held off on starting the series until Sunday.
Here is the full schedule as released by the the NBA and Pistons:
Game Date Teams Time (ET) TV/LOCAL TV
Game 1 Sun., April 17 Detroit at Cleveland 3:00 p.m. ABC/none
Game 2 Wed., April 20 Detroit at Cleveland 8:00 p.m. TNT/TBD
Game 3 Fri., April 22 Cleveland at Detroit 7:00 p.m. ESPN/TBD
Game 4 Sun., April 24 Cleveland at Detroit 8:30 p.m. TNT/TBD
Game 5* Tue., April 26 Detroit at Cleveland TBD TBD
Game 6* Thur., April 28 Cleveland at Detroit TBD TBD
Game 7* Sat., April 30 Detroit at Cleveland TBD TNT/TBD
All games can be heard on the Pistons' flagship radio station, Detroit Sports 105.1 FM.