Football fans were celebrating across Manchester on Saturday after United won the Premier League and City lifted the FA Cup two hours later.
And the partying will continue until the end of the month.
City will hold a parade through Manchester on May 23 after ending its 35-year trophy drought by beating Stoke at Wembley Stadium.
And the parade to mark United winning a record 19th English title will take place a week later on May 30. United won the Premier League with a game to spare by drawing at Blackburn.
But United will also hope to have the European Cup with them on the open-top bus. Alex Ferguson's side takes on Barcelona two days earlier in the Champions League final at Wembley.