I have associated a DateTime field to a Content Type bound to a List.
I should use this field to group list data by Year+Month, and show
this in a Webpart.
Then, i should be able to click on the Year/Month in that webpart, and
refresh another webpart in the same page to show the DateTime filtered
items in the list.

I have tried using the OOTB webpart connections and some custom views,
but obtained no acceptable result.
Any ideas?