It’s a good problem to have but it’s still a problem that needs solving.
How to schedule two teams and two Springsteen concerts all in one building over four days.
The Celtics  are almost certain to play Saturday the 18th with Game 2 of the first round to be played on Monday, the 20th. The reason is as follows:
The NBA playoffs  begin on Saturday, Apr. 18. The NHL  playoffs for the Boston Bruins  begin at home at the Garden on Thursday, the 16th since the Celtics finish up their regular season on Wednesday, the 15th against Washington. It should be pointed out, of course, that the Bruins and owner Jeremy Jacobs own TD Banknorth Garden .
If the Bruins play Montreal in the first round, it’s very likely that Hockey Night in Canada will want the Bruins-Habs on Saturday night and the Bruins would acquiesce to that request. If that scenario takes place, then you’re likely looking at a Celtics playoff opener at 12:30 on ESPN in the afternoon and a Bruins-Canadiens nightcap.
If the Bruins play the New York Rangers  in the opening round, it’s more likely, the Bruins would play on Sunday afternoon on NBC and the Celtics could move to a Saturday night game on TNT.
In any event, the NBA wants to avoid having the Celtics or any team for that matter, play on back-to-back days if at all possible.
Bruce Springsteen takes over the building on April 21 and 22 and there’s no moving The Boss. Once again, a great time to be a Boston sports fan.