The Flowers of Manchester was the earliest tribute recorded and the eight stars who passed away from the "Busby Babes" remain affectionately known as The Flowers of English football, The Flowers of Manchester.
The under-19s and club officials will lay a wreath and observe a minute's silence at 3.04pm at Partizan Stadium - the venue for the European Cup quarter-final between the clubs.
The afternoon began with words from the club chaplain Reverend John Boyers, and there were also readings by United director Michael Edelson, legendary former manager Sir Alex Ferguson and executive vice-chair Ed Woodward.
I used to train two or three nights a week with Queen's Park, so after I'd finished my work I went along to the training ground, but when I arrived, people were crying.
A few surviving doctors and nurses involved in the treatment of manager Sir Matt Busby and his team will be in attendance, with the fans donating art to the hospital in an expression of gratitude for the treatment they provided.
"What we are seeing is a team of footballers without frills, normal people who came out of the community, got on their bikes and rode down to Old Trafford to play football", Hunt explains.
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The tragedy in Munich is ingrained into the heart and soul of Manchester United.
Gaskell, now aged 77, made his senior debut for United in 1956 and became the youngest ever player to appear for the club when he helped them beat rivals Manchester City in the Charity Shield at the age of 16 years and 19 days.
There were also representatives from Sheffield Wednesday, United's first opponents after the incident, and Bishop Auckland, who loaned players to the club in the aftermath.
Ferguson also talked about how United rose back again after the tragedy and the legandary "Busby Babes". Jimmy did a bit of scouting for me and he always spoke very openly about the Babes.
"Really, the players who died, they made United", adds McGuinness, who was on the United coaching staff when they won the European Cup and later managed the club.
"The Babes are what gives this club such a fantastic romance, in terms of how they played the game and how they generated this thread of youth throughout the club".