KonsoleKalendar supports the removal of entries in a calendar file or
resource using the
--delete command line argument.
Calendar entries to be removed are specified exactly by their Unique-string
identifier (UID) using the
option. UIDs are found by first viewing the event,
Events successfully deleted will be immediately removed from within KDE calendar applications (KOrganizer for example).
When you delete something from the calendar you cannot undo it! In other words, when you delete an entry you cannot reverse the deletion. It's gone for good.
Here we delete a calendar entry with UID