365 Days (Polish: 365 dni) is a 2020 Polish erotic thriller film directed by Barbara Białowąs and Tomasz Mandes. Based on the first novel of a trilogy by Blanka Lipińska, the plot follows a young Warsaw woman (Anna-Maria Sieklucka) in a relationship falling for a Sicilian man (Michele Morrone), who imprisons and imposes on her a period of 365 days for her to fall in love with him.

The film was released theatrically in Poland on 7 February 2020 and was later made available on Netflix on 7 June 2020. It quickly gained global attention, becoming one of the most watched items in numerous territories on multiple continents, and having one of the longest periods as the most watched item in Netflix's history in the United States. Despite this popularity, the film was universally panned by critics, with criticism aimed at its perceived glorification of the Mafia and heavy use of sex sequences that included sexual violence, drawing comparisons to the Fifty Shades trilogy; it is considered one of the worst films of all time.

A sequel, 365 Days: This Day, was released on Netflix on 27 April 2022.