Well, I do already have a 'football' calendar as one of my calendars that I use and sync across my devices. Sure, can share that one with others ... but the purpose of this one was slightly different.
This I thought as one image file, which can be used as a sticky post at the top and throughout the season all the discussions re: fixtures changes and TV picks and upcoming draws etc etc. can then just go under that thread, but second it just gives you everything in one glance rather than the calendar on your phone or in outlook etc. where there's other work and personal appointments as well and perhaps you can't see the whole of the 10 months season view like that. Also visually looking at it like that gives you how many days are in between fixtures and what's next etc. or in cups' when is the next round ... for league games, what's before and after a particular game etc etc.
As per one of the suggestions, one can make it their wallpaper or screensaver so I am sure some would find this useful as well. But yes to answer the iCal question, happy to do one of those as well. I already do it for myself. As for City's their ones aren't always updated (not as fast and accurate as I do mine manually); even today the fixtures are showing wrong channels etc. (PrimeVideo for FA Cup QF, which should be BT Sport). Their time zone maps were always wrong (so I had to make my own from scratch for the pre-match headers) ...
Let's see how it shapes up, this was just a suggestion ... we still have some time to go till the next season :)