Using GET to filter Category page

it’s not possible out the box at the moment. it may be possible with custom coding but unfortunately we are quite limited with regards to custom coding as per the support policy – https://eventsmanagerpro.com/support-policy/

Can you use the ‘scope’ variable in the query string and put start and end dates in there somehow?

The category pages don’t have an option to filter by $_GET so that’s something you’d need to custom code yourself.

That said, if it’s any help, the ajax $_POST query uses scope like this:

scope[0]:2017-08-18
scope[1]:2017-08-24

Is that something that could be inserted via the templates or would it involve editing em_object?

Editing plugin files isn’t recommended because it may cause errors and edits will be overwritten when the plugin upgrades.

It might be possible to reuse some of the AJAX code mentioned above to do this.

That said, unless there’s some reason to do this way, a much easier way to generate this kind of listing would be to use the [event_list] shortcode with the category and scope attributes:

https://wp-events-plugin.com/documentation/shortcodes/
https://wp-events-plugin.com/documentation/event-search-attributes/