It's so sad. With CalDAV we have a really nice open protocol for syncing events, todos and notes. The protocol, which is technically more of a file format (iCalendar) even supports quite complex reccurence rules and even things like recurring tasks. Unfortunately, client (and server) applications usually only implement a subset of what's possible. Know some good ones? Let me know! #CalDAV #iCalendar #ics #Calendar #PIM #LinuxApps