THANK YOU johnaustinny! Too bad the forum has no thumbs up or votes. It’s odd that changing a theme would “lose” the entire online calendar. Editing the calendar still showed them so I didn’t panic – just had to find the angels who post solutions.
Editing ..\wp\wp-content\plugins\ajax-event-calendar\js\jquery.fullcalendar.min.js to replace curCSS to css (then ftp the file) fixed the problem.
