Web Content events can be published either as an iCal file or via the Calendar data API. Publishing via the Calendar data API: A typical ATOM entry that represents a standard all-day event might look something like this: <entry> ⋮ <title type="text">Independence Day</title> <gd:when startTime="2006-07-04" endTime="2006-07-05" /> ⋮ </entry> This would create an event called "Independence Day" on Ju