Per Sean Shapiro (no relation), the NY Rangers 1st round series against the NJ Devils will begin on Tuesday night with Game 1 at the Prudential Center. Game 2 will be Thursday night. There is no word on when Game 3 will be, at least not yet. The whole schedule will likely be announced over the weekend or after the last two games for the NHL season conclude tonight.
The Rangers would be at MSG for Games 3 and 4, which if sticking to the every other day schedule, puts them on Saturday and Monday.