What is the query string for post-slug

Currently my permalinks structure is like “example.com/posts/post-title” but I’d like to change it to “example.com/2006/02/post-title”.

I know how to do this in the options section, but as everyone knows URLs must not die, so I’d like to know what the post-slug is called when it’s part of the query string.

Like I know that ?p=54 will access the post with the ID of 54, but what’s the post-slug equivalent, something like: ?postslug= ?