Better late than never, the Knicks have finalized plans to hold a special 50th anniversary celebration night March 21 to honor their first championship team of 1969-70, The Post has learned.

All the players from the Knicks’ first title team have been invited for a Saturday fete as the Knicks play host to the Warriors. The wrangling was finding a proper date to ensure the most players could attend.

Last month, at least two of the former 1969-70 players were privately surprised they had heard nothing from the organization about a golden anniversary night.

The Mets, to celebrate their 50th anniversary of the 1969 World Series title, staged multiple events last season and promoted it incessantly.

Team captain Willis Reed, who lives in Louisiana, is expected to be on hand to join MSG Network broadcaster/star running mate Walt Frazier, Bill Bradley and Dick Barnett.

John Warren, Mike Riordan, Cazzie Russell, Don May and Bill Hosket are among the invitees.

The deceased members of the squad are Dave DeBusschere, David Stallworth, Nate Bowman and head coach Red Holzman. Phil Jackson was also on the 1969-70 team on injured reserve. It’s unclear if the former Knicks president will attend.

The Knicks beat the Lakers in a Game 7 on May 8, 1970, to win it all, but these are tough times to celebrate those glory days.

The 50th anniversary season hasn’t gone as planned with the firing of coach David Fizdale in December, the axing of president Steve Mills earlier this month and a record of 17-38 coming out of the All-Star break. The Knicks enlisted – very publicly – a branding consultant, Steve Stoute, to change their image in January.

This will mark the Knicks’ seventh straight season out of the playoffs and will extend their championship drought to 47 years. The Knicks won their second title in 1973.