If you have The Events Calendar plugin set up with recurring events, how do you change a date when one of the meetings falls on a holiday?
First, find your Series:
In the WordPress dashboard, under Events, click on Series.

Scroll down to find the Series you need to edit, in this case it is “Selectboard Meeting” – double click on the title, or hover over and Select “edit.”

Scroll down to see the list of scheduled events and choose “Convert to Single” for the date you want to change.

Edit the date (and anything else you want to change).

I also edited the top description to explain the meeting date change.

I figured this out for a client, but thought it might be useful to post here. Let me know if you have any questions!