Hi there unityboulder,
Yes – it’s completely customizable 🙂
I’m not sure if you are referring to our list widget or the calendar widget, but in either case you can add custom CSS rules via a tribe-events/pro/tribe-events-pro.css stylesheet – or, if it is specifically the calendar widget you are interested in, you could set up tribe-events/pro/widget-calendar.css instead – which you would add to your theme directory (see here for more complete instructions).
Within that, you could specify something like this:
.widget.tribe_mini_calendar_widget,
.widget.tribe-events-adv-list-widget,
.widget.tribe-events-list-widget {
font-family: cursive; /* Change to your desired font */
}
Adding a thumbnail image is also possible and we actually have an existing tutorial for this, which you can find here:
tri.be/adding-post-thumbnails-to-the-events-list-widget/
If you are interested in the calendar widget rather than the list widget then it’s still worth a read – a lot of the same principles still apply 🙂
I hope that helps!