Suggestion: Date Range Search

Already available in both versions, see date_query documentation here.

Thanks Mikko! I appreciate it!
Im gonna have to read and try to understand this whole thing when i have the time, because i have no codex experience whatsoever.

Ideally, this is what i would like to show on a page:

– A search field
– A category filter (either a dropdown or checkboxes)
– Date range

This way people can search within a specific category, and within a specific date range they choose.

Yeah, you can certainly do that. You just need to add some code that reads in the date range from the form and formulates a neat date_query of it. You can use relevanssi_modify_wp_query or pre_get_posts to add the date_query to the $wp_query object so that Relevanssi sees it.