khal supports caldav: https://github.com/pimutils/vdirsyncer https://github.com/pimutils/vdirsyncer There is a task equivalent, which also supports caldav sync

khal supports caldav: https://github.com/pimutils/vdirsyncer https://github.com/pimutils/vdirsyncer There is a task equivalent, which also supports caldav sync https://github.com/pimutils/todoman https://github.com/pimutils/todoman