Like I mentioned in this post, Sandoval's The Monkees: The Day-by-Day Story of the 60s TV Pop Sensation says that "A Little Bit Me, A Little Bit You" b/w "The Girl I Knew Somewhere" was released in March 1967. The DVD trivia for "Alias Micky Dolenz" (which I watched on its original air date) has a more specific date and claims that it was 8 March (fifty years ago to-day), coincident with Micky's birthday: