I want a FOSS calendar that I can see other peoples' google calenders on. My girlfriend is very busy so I often need to check her google calendar to do scheduling stuff, but I don't want to use google myself, at all. I've seen people claiming they could do a setup to see a partners google calendar while using fossify calender app but for the life of me I can't figure it out. I think I need another syncing tool and something about servers? Is any of this even secure also? Can it be encrypted automatically? Please help- I have no idea what I'm doing.