Every content type should have at least a reasonable default view for content editor.
For site visitors it is up to you to hide those helper contents at all.
Apart from that it is broken by design for content editors to maintain repeating date and times as dedicated content objects.
I have seen such a shitty design for a seminar implementation and the enduser almost kissed me after moving this fine granular configuration into the main seminar object using a custom grid field field.