khal 1:0.10.5-1.1 (s390x binary) in ubuntu lunar

 Khal is a standards based CLI and terminal calendar program,
 able to synchronize with CalDAV servers through vdirsyncer.
 .
 Features:
  - khal can read and write events/icalendars to vdir,
    so vdirsyncer can be used to synchronize calendars
    with a variety of other programs,
    for example CalDAV servers.
  - fast and easy way to add new events
  - ikhal (interactive khal) lets you browse and edit calendars and events