PLUGIN IS NO LONGER SUPPORTED

A note from the author I found at the other support location:

Due to other pressing obligations, I am no longer able to update or support
the Ajax Event Calendar plugin for WordPress.

For other free calendar plugin options: http://www.blazdesign.com/5-free-
wordpress-calendar-plugins/

I thank everyone who contributed and promoted this project for their
support.

https://ww.wp.xz.cn/plugins/ajax-event-calendar/