Simple to use, and simply displayed calendar.
When you hover over the item you get the information including any images you’ve added via html. There is no fancy editing of the description it’s just a text box that can take html but no WYSIWYG.
Each entry can be link to a url so you could link each to a post or page on your own website or somewhere else.
It does have repeat ability.
It does categories.
No multiple leaders, speakers.
It has a few widgets.