Hi Derek,
Thanks for reaching out to us! I’d be happy to help you 🙂
It would be possible to add an end date filter to an event listing page, but that would require some customization which is beyond the scope of this support.
To get started, I would recommend you to read the following article as it explains how to create custom fields for filter bar (including examples):
https://theeventscalendar.com/knowledgebase/creating-custom-filters-for-filter-bar/
You may also suggest this feature in our User Voice page to let us know. The more votes a feature request gets, the higher chances it has to become a new feature.
Cheers,
Jeremy