The decision was made on request of Humberside Police due to the annual Hull Fair.
Only 14 of City's home games will now be played on a Saturday at 3pm. There will also be a gap of 8 weeks without a home game at the regular timeslot, between the Brighton game on 20th August and the Derby game on 22nd October.
Fans are reminded that the Bank Holiday Monday match against Leicester on 29 August will be a 3o'clock kick-off.