(Saturday, December 31, 1966) — “I’m a Believer” by The Monkees peaked at #1 on today’s Billboard Hot 100 singles chart for seven consecutive weeks (Dec. 31, 1966, Jan. 7/14/21/28, Feb. 4/11, 1967).

It was the group’s second of three number one hits on the chart (1966-1967).