At the time of writing this blog, the typical calendaring situation still is: me, maybe-hopefully you, and a (growing) bunch of other people using Nextcloud Calendar, while the vast majority still uses Google for calendaring needs. Luckily sharing/syncing between these calendars (say, between you and your family member) is possible, and relatively easy — but not trivial. Recently I had to do just this: set up calendar sharing with a loved one to and from Google Calendar. Although this is documented in various forum topics, it can be hard for a non-technical person to parse and understand that, and I haven’t found a good clear explanation I would comfortably share. So I wrote one for my own use.
I’m posting this here so I can simply send it to the next family member when it’s needed, and for you to use if you need a cheat sheet. I also post a “screenwalk” gallery at the end of each sync direction to make things a bit more straightforward, plus here’s a pdf of just the steps, because why not.