Yesterday (Bulgarian: Вчера) is a 1988 Bulgarian drama film directed by Ivan Andonov and based on Vlado Daverov's semi-autobiographical novel of the same name. It stars Hristo Shopov, Sofiya Kuzeva and Georgi Staykov as students at a boarding school in Lovech in the late 1960s.

Shortly after the film's release, its final scene where the characters take a blood oath became a cult classic, and popularised the song "Kletva", which students began singing at their graduation proms.