FullCalendar v4 vs v5

I decided it was time to try out FullCalendar v5, since the plugin settings page says that v4 will be deprecated at some point.

Obviously, I have to redo the custom CSS I wrote for v4, but I’m wondering if there’s anything else I should know about. Is this addressed in the Private Google Calendar online docs anywhere?

Thanks for this great plugin – it’s allowing us to do all kinds of useful things on our site, including allowing people to see what resources are and are not available.