@ah4x4
I had the same problem which was solved today by @sdetweil. It seems to be a bug, see here how to correct it manually, before it ends in the release:
https://github.com/MichMich/MagicMirror/issues/2629#issuecomment-899548844
Second point, if you do not want a countdown but the real dates for future events, set
urgency: 0as additional parameter in calender config.
All the parameters are described here https://docs.magicmirror.builders/modules/calendar.html