Everton are fitting opponents for Ole Gunnar Solskjaer's final Premier League game before he celebrates his first anniversary as manager at Old Trafford.
Back in April, it was a humiliating 4-0 defeat at Goodison Park that provided definitive evidence that United needed a radical overhaul in attitude and personnel.
From that squad, Romelu Lukaku, Alexis Sanchez and Chris Smalling have gone. Phil Jones, Diogo Dalot and Nemanja Matic have been largely sidelined.
Everton will be Ole Gunnar Solskjaer's final Premier League game before his first anniversary
Marcus Rashford is likely to be in the Manchester United side when they face Everton
Hungry new signings Aaron Wan-Bissaka, Harry Maguire and Daniel James have brought energy to a club that had staggered for six years post-Sir Alex Ferguson.
Most importantly of all, Solskjaer believes he and assistants Mike Phelan, Michael Carrick and Kieran McKenna have overseen a change in culture which will eventually see them challenge for major trophies again.
'That game at Everton was the biggest eye-opener,' says the Norwegian, whose authority has been enhanced by victories over Tottenham and bitter rivals Manchester City in the past 10 days.
'If you lose 2-1 or 3-2, a close game, you can see something. But when it's 4-0 and a capitulation? That was my lowest moment, definitely. You could see that from the press conference because I didn't know what to say.
'It's different now. We are on the right track.
Romelu Lukaku (L), Alexis Sanchez (R) and Chris Smalling have left Manchester United
Harry Maguire was signed for a world-record fee for a defender from Leicester in the summer
'If you don't pull your weight in training or put in a shift, you are the odd man out. It didn't always use to be like that, I have to say. We still give the players some 'medicine' but we don't need a major operation.'
Solskjaer, 46, is too polite to mention his predecessor Jose Mourinho. But it is clear he was shocked by the desperately low morale in the camp when he arrived last December.
An early flurry of wins, including one at Paris Saint-Germain in the Champions League round of 16 last March, provided a short-term fix before reality kicked in with six defeats in eight matches.
Staff complained that Mourinho never spoke to them. Solskjaer has made it a priority in his first year to make the workplace at Carrington a fun place to be again.
'The biggest change has been the mood,' says Solskjaer. 'Working for Manchester United is like being part of the family.
'It doesn't matter if you're Kath on reception, Mike behind the cooking plates, Alec doing the kit, or Ian, or us as coaches or the players.
Mason Greenwood scored twice for the Red Devils against AZ Alkmaar in the Europa League
'The feedback I get from visitors has been positive, that we're a club with great people.
'I'd only been back once since I left and I didn't feel I could. Last week we had Patrice Evra, Ando [Anderson]. Berba [Dimitar Berbatov] has been in. Nemanja Vidic, Rio Ferdinand, Roy Keane.'
Of course, any lasting feelgood factor requires results. Solskjaer's United have had good and bad streaks. This season, they have achieved