Young's first big game as an Old Trafford player following a £16million move from Aston Villa and taught him everything about his new club's will to win.
He told The Sun: "I know what people say about the Community Shield just being a glamorous friendly but there was a lot on that game.
"The boys had lost to City in the FA Cup semi-final at Wembley a few months earlier and didn't want it to happen again, so the match had added spice.
"In the dressing room at half-time, we were sat there losing 2-0 and we were all so determined we would not be beaten.
"We had played quite well in the first half, despite the score, and everyone was saying how we would create chances and get ourselves back into it.
"We said, 'If we get one, we'll get more' and that's what happened. We got one and it just carried on.
"It was a special moment for me. I was delighted to get a first bit of silverware so quickly. I felt like this is what it was all about and why I'd joined United.
"I'd signed to win trophies and I'd already got my first one. Before that the only medal I'd won was for getting promotion to the Premier League with Watford.
"When you join United you have that belief, it gets drummed into you straight away.
"You get that winning mentality — players even get upset when they lose in training. It's how everybody is throughout the club."