After ABC canceled the Roseanne revival, a gently satiric advertisement* connected to Netflix for this program was posted (*"Reminder: One Day at a Time is a sitcom about a tight-knit, working-class family that tackles extremely topical social issues smartly and innovatively. You know, if you're suddenly looking for a show like that...")
Even though the series focuses on a Cuban-American family, Justina Machado, Marcel Ruiz, and Rita Moreno are Puerto Rican while Isabella Gomez is Colombian.
In the last episode of season one, Rita Moreno shouts, "Hey, you guys!" which she first said in season one (and which would later become the series catchphrase) of The Electric Company (1971).
Mackenzie Phillips from the original sitcom makes a cameo in season 1, episode 8.
Season 4 was supposed to have 13 episodes, but only seven were produced, as filming was stopped due to the 2020 Coronavirus pandemic. The seventh one is an animated special made because it was about the 2020 Election, and the writers didn't want to lose the time window.