One Day at a Time is an American sitcom based on the 1975 series of the same title. Executive producer Norman Lear's company, Act III Productions, approached Sony Pictures Television with the idea of reimagining the original series with a Latino family. Lear had previously executive produced the original series. The series was developed by Gloria Calderón Kellett and Mike Royce, with Lear and his producing partner Brent Miller as executive producers.

The series features an ensemble cast starring Justina Machado, Todd Grinnell, Isabella Gomez, Marcel Ruiz, Stephen Tobolowsky, and Rita Moreno. The show revolves around a Cuban-American family living in the Los Angeles neighborhood of Echo Park, focusing on a single mother who is an Army veteran dealing with PTSD, her kids and her Cuban mother. The re-imagination of the original CBS sitcom tackles issues like mental illness, immigration, sexism, homophobia, gender identity, and racism that Hispanic people living in the United States face.

The series premiered on Netflix on January 6, 2017; with subsequent seasons premiering on January 26, 2018, and February 8, 2019. Netflix canceled the series on March 14, 2019, but on June 27, 2019, Pop announced that it would revive the series in 2020, making One Day at a Time the first original program canceled by Netflix to be revived on a traditional linear network. The fourth season premiered on March 24, 2020, on Pop, with a simulcast on TV Land and Logo TV; the simulcast with TV Land was made permanent shortly thereafter as TV Land's ratings for the premiere were nearly five times that of the episode's premiere on Pop. In March 2020, production on season 4 came to an end due to the COVID-19 pandemic. First-run episodes continued to broadcast through April 28, 2020, with further production and/or broadcast not expected to resume until 2021. Plans were announced the next day to make an animated special, further reported in May 2020 as "The Politics Episode". The episode, co-produced with the Canadian animator Smiley Guy Studios, premiered on June 16, 2020. CBS began airing the season four episodes on October 12, 2020. In November 2020, the series was canceled after the fourth season by Pop, but Sony Pictures TV indicated that it would be shopping the series to other outlets. On December 8, 2020, it was announced that there would be no new episodes, ending the series' run for good.

Upon its release, the show received critical acclaim, with critics and journalists praising the writing and the performances of Machado and Moreno. One Day at a Time was listed as one of the best television shows of 2017, with numerous critics ranking it as one of the top ten shows of the year. The series received multiple awards and nominations, including four Primetime Emmy Award nominations for Outstanding Multi-Camera Picture Editing for a Comedy Series and won two in 2019 and 2020. At the 2017 Imagen Foundation Awards, the series won Best Primetime Television Program – Comedy, Best Actress – Television (Machado), Best Supporting Actress – Television (Gomez) and Best Young Actor – Television (Ruiz). Moreno was nominated for a Critics' Choice Television Award for Best Supporting Actress in a Comedy Series. The series has also been nominated three times for a GLAAD Media Award for Outstanding Comedy Series.

This marked Norman Lear's final offscreen appearance before his death on December 5, 2023.