The #1 song on December 21, 1977

How Deep Is Your Love By Bee Gees

Other #1 songs on December 21, 1977

UK #1 Song

Mull of Kintyre / Girls' School
Wings

#1 R&B Song

Serpentine Fire
Earth, Wind & Fire

#1 Country Song

Here You Come Again
Dolly Parton

#1 Dance Track

Once Upon a Time... (all cuts)
Donna Summer

Notable December 21 birthdays in the 1970s

Steve Montador

Born December 21, 1979

Rutina Wesley

Born December 21, 1978

Natalie Grant

Born December 21, 1971