https://en.wikipedia.org/wiki/Comparison_of_CalDAV_and_CardDAV_implementations https://en.wikipedia.org/wiki/Comparison_of_CalDAV_and_CardD... Edit: Everyones

https://en.wikipedia.org/wiki/Comparison_of_CalDAV_and_CardDAV_implementations https://en.wikipedia.org/wiki/Comparison_of_CalDAV_and_CardD... Edit: Everyones favorite company even has some calendar server that runs on linux, i am told: https://trac.calendarserver.org/ https://trac.calendarserver.org/ Did you try that?