Query Builder - Date Picker

Working on some custom date picker stuff on the query builder screen for a system redesign. This query builder has got to be one of the most complex faceting UI's I've worked on thus far.

I took some patterns from how some e-commerce sites do it, however, the use case for this particular feature is a tad bit different given that the user is not funneling down to a singular result but needing to be able to select multiple items within different categories. You can't see it in this screenshot because the date picker is in the way, however, each selection adds a tag to the right "query items" section, thus allowing the analyst to "Analyze" the selection in bulk when complete