One Day at a Time is an American situation comedy on the CBS network that aired from December 16, 1975 to May 28, 1984. It portrayed Ann Romano, a divorced mother, played by Bonnie Franklin, her two teenage daughters Julie and Barbara Cooper (Mackenzie Phillips, Valerie Bertinelli) and Schneider, their building superintendent (Pat Harrington).

The show was created by Whitney Blake and Allan Manings, a husband-and-wife writing duo who were both actors in the 1950s and 1960s. The show was based on Whitney Blake's own life as a single mother, raising her child, future actress Meredith Baxter. The show was developed by Norman Lear and later Embassy Television.