Hi Wayne and thanks for getting in touch!
I’m afraid there isn’t a straightforward approach for hiding a multiday event from a specific day. One method you could consider is targeting the specific day and event in CSS and hiding it that way. For example:
[data-day="2016-03-28"] .post-478 {
display: none;
}
…where the date is tailored to the Sunday on your calendar and the post number is the ID of your Event post.
Sorry I don’t have more of a concrete solution for you, but I do hope this at least helps. Let me know if if it does.
Thanks,
Geoff