Days of Betrayal () is a 1973 Czechoslovak drama film directed by Otakar Vávra. The film was entered into the 8th Moscow International Film Festival, where it won a Diploma. It was also selected as the Czechoslovakian entry for the Best Foreign Language Film at the 46th Academy Awards, but was not accepted as a nominee. The film was meant as the first part of Vávra's "war trilogy" consisting of movies Days of Betrayal, Sokolovo and Liberation of Prague.