United's home game against Doncaster Rovers in October will now kick-off at noon.
The move was made on the advice of Humberside Police, although the games against Leeds United and Hull City will both take place at 3pm.
The club have also confirmed that the home games against Barnsley, Doncaster, Leeds, Middlesbrough, Nottingham Forest, Hull, Sheffield United and Leicester are considered category A so will be the most expensive for ticket prices.
The move was made on the advice of Humberside Police, although the games against Leeds United and Hull City will both take place at 3pm.
The club have also confirmed that the home games against Barnsley, Doncaster, Leeds, Middlesbrough, Nottingham Forest, Hull, Sheffield United and Leicester are considered category A so will be the most expensive for ticket prices.