Titles with incomplete release dates

I've made a hobby out of finding titles, usually years-old TV episodes, with no release date submitted and filling them in from information on TV.com or wikipedia. This is easy enough when there's no year yet given (http://www.imdb.com/search/title?at=0&count=250&num_votes=,4&sort=year,asc&start=160...) but is there a way to search for titles with a year given but no month, or with a month but no day?