A quick note for everyone who has written in the last few days.
The calendar does not have a “private” checkbox. Visibility is decided by the category of the event: events in Network events are public; events in Consortium meetings only appear to partners and stakeholders; the two internal categories are for partners only and for stakeholders only.
So if one of your events does not show up where you expect, the first thing to check is the category, not the date. Open the event, look at the right-hand column, and confirm it has exactly one of the four categories.
If it still does not appear after saving, tell us the event name and we will look at it.