"December, 1963 (Oh, What a Night)" is a song originally performed by the Four Seasons, written by original Four Seasons keyboard player Bob Gaudio and his future wife Judy Parker, produced by Gaudio, and included on the group's album Who Loves You (1975).

The song features drummer Gerry Polci on lead vocals, with Frankie Valli, the group's usual lead vocalist, singing the bridge sections and backing vocals and bass player Don Ciccone singing the falsetto part.

Billboard said that it has "the flavor and fun of '60s rock with a disco feel," and praised the production and the lead and harmony vocals as well.

"[13] Record World called it a "disco flavored item in [the Four Seasons'] timeless harmony mold.

It featured the band performing on a stage along with scenes of a 1950s/early 1960s diner where they were all together with young women dressed in period outfits and drinking ice cream sodas.

The French singer Claude François also recorded a version of this song called "Cette année-là".