The Events Calendar Filter Bar GPL Overview:

Advanced search filters for your calendar Allow users to search for events by category, tag, venue, organizer, day of the week, time of day, and price.

The Events Calendar Filter Bar GPL Features:

Add filters to your calendar Create a bar at the top of the calendar where users can narrow down events. Appended URL All filters append the calendar URL, so you can share a pre-filtered calendar with others. Custom Filters If you’re using Events Calendar Pro, you can create your own custom calendar filters. Flexible layout Position your filter bar vertically or horizontally on the calendar. Responsive design The filter bar looks great and works on any size screen or device. Display controls Choose to display all your filters or only certain ones. You pick the order. Virtual Events If you’re using Virtual Events, you can display Virtual Events as a filter Customizable Choose which filters to show