pimsync synchronises CalDav to a directory where each event is an icalendar file. You can use khal or any other tool to operate in these files.

This tools is a successor to vdirsyncer, which filled a similar role but with several limitations.

I’ve working in Pimsync for many months now. The basics all work fine, but still working in some extended feature. Feedback is most welcome at this stage.

https://pimsync.whynothugo.nl/