"Calendar Girl" is a song by Neil Sedaka. The music was composed by Sedaka and the lyrics by Howard Greenfield. Recorded in 1960 and released in 1961, it was a Top-5 hit single for Sedaka, peaking at #4 on the US charts and #1 on the Canadian and Japanese charts.

Howard Greenfield got the inspiration for the song title from an old movie listing in TV Guide.Record producer Joe Viglione, writing for AllMusic, describes the song as a G-rated calendar of pin-ups such as Betty Grable and Marilyn Monroe, using verbal rather than visual imagery. Each month gives a different reason for the singer's affection for the titular character, and September—"I light the candles at your sweet sixteen"—may be a reference to Sedaka's yet-to-be-released hit "Happy Birthday Sweet Sixteen" or just an acknowledgement of his target audience. Other months in the song reference Valentine's Day in February, the Easter Bunny in April, a junior prom in May and June.

Instrumentation on the song was provided by Stan Applebaum and His Orchestra, with Gary Chester on drums. Recording of the song required 26 takes over a three-hour period.

The song was released to a 45 rpm single backed with a country-and-western song, "The Same Old Fool". Both songs were also released on a Compact 33 Single, a short-lived format that RCA Victor promoted in the early 1960s.

A contemporary Scopitone promotional clip for the song was filmed in color. It consists of Neil Sedaka playing the piano and dancing alongside a number of models, on a mock stage made to resemble calendar themes.

"Calendar Girl" became Sedaka's sixth hit in two years, but was also his first top-five record. The song peaked at #4 on the US Billboard chart and #1 on the Canadian and Japanese chart in 1961. In New Zealand, the song reached #7. The recording peaked at number 8 in the UK.

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