As soon as someone comes up with a half decent hosted calendar service that's half as good as Google Calendar.
People like to give GCal a lot of shit while comparing it with local apps; there's very few hosted services that are so versatile.
I use the Calendar app with NextCloud[0] for a CalDAV server + calendar web interface. It's fully-featured as far as I can tell. I use its CalDAV functionality to sync to my Android phone using DAVx^5[1], which integrates the calendars natively so that you can use whatever calendar app you want on your phone (I use Etar[2]).
Nextcloud's website does have a page on getting ("free"?) accounts from providers. It took me a hot second to find the "change provider" link, but that allows you to see a bunch of options.
I'm set on going towards privacy/transparency/local-first-data.