The song was released on August 16, and by the week of November 5, 1966 it was Number One.
When I was a kid I was not a huge fan of this song; maybe because they played it all the time. I liked more of the Monkees' less popular songs. Now, though, I really like it. Did you ever happen to notice that it's about a guy meeting up with his girlfriend before he gets shipped off, presumably to Vietnam? It's actually a pretty deep song about loneliness, duty, and love. Give it a listen.