Creates an event.
If you provide recurrenceRule, an event with {"recurrenceType": "MASTER"} is
created. Then, you can't set start.localDate to a past date, though the time can be
earlier on the same day. You can, however, create single-occurrence events for
past dates.
You can't create an event with recurrenceType set to INSTANCE or EXCEPTION.
INSTANCE events are generated automatically based on the recurrence rule in the
relevant MASTER event. EXCEPTION events are automatically created when you
update
an INSTANCE event, which changes its recurrenceType to EXCEPTION.
This method doesn't return any custom errors, but may return standard errors. Learn more about standard Wix errors.