How to make Map view show only current day’s events ?

Any suggestions on getting the map view page to show only the current day’s events ? I don’t mind editing the template / php I am just not sure exactly what needs to be changed so it only shows that current day’s events. I want this to be the default view.

Here is a link to how it currently looks:
https://ayrfci.com/events/category/oshawa/oshawa-wing-specials/map/