days with events available clickable?

There are two widgets on that page you might be referring to: widget calendar and the agenda widget

Widget Calendar please. Thanks!

I do not use widgets on my site, I use code in the template.

The demo only has two events so that’s why you are not seeing more events. You can use CSS to restyle the past events to match the regular days and remove the click event.

html .eo-event-past a {
    pointer-events: none !important;
    cursor: default !important;
    background: none !important;
    color: #444 !important;
}