A Brighter Summer Day is a 1991 Taiwanese epic teen crime drama film directed by Edward Yang, associated with the New Taiwanese Cinema. Its English title is derived from the lyrics of Elvis Presley's 1960 rendition of "Are You Lonesome Tonight?". Set in the late 1950s and early 1960s, the film centers on Xiao Si’r (Chang Chen), a boy from a middle-class home who veers into juvenile delinquency.

The film was selected as the Taiwanese entry for the Best Foreign Language Film at the 64th Academy Awards but was not nominated.Since its release, A Brighter Summer Day has been praised as one of Yang's best works, amongst one of the best films of the 1990s, and one of the greatest films of all time. It ranked 78th in the 2022 Sight & Sound Greatest Films of All Time poll, one of four Chinese-language films to be included, and above Yang's Yi Yi.