Nottingham City Council Leader, Councillor David Mellen, said: "We fully understand the club's position on this and while we would have loved to stage this celebratory event next month, it's obviously a priority for Notts County to be fully ready for their first season back in the English Football League.
"We accept we got it wrong by not staging an event for Notts County immediately after they secured their promotion, and we apologise again to them and their fans for that. It in no way diminishes how proud we are of them in securing a return back to where they belong."
A spokesperson from Notts County FC said: "While we appreciate Nottingham City Council's cooperation in our planning of a pre-season event celebrating our return to the EFL, we have decided this will not be feasible."