A Happening of Monumental Proportions (known as A Very Bad Day in some countries) is a 2017 American comedy-drama film directed by Judy Greer in her directorial debut and produced by Chris and Paul Weitz.

Gearing up for Career Day at his daughter's elementary school, the new boss fires him when his affair with his married assistant (Jennifer Garner) is revealed.

Lonely Darius, Daniel's boss's (Bradley Whitford) son, finds himself instantly entranced by Patricia, Daniel's daughter (Storm Reid), and seeks advice from their school's shop (John Cho) and music teachers (Anders Holm) on how to win her heart.

Meanwhile, the principal and vice-principal (Allison Janney and Rob Riggle) spend the day trying to hide the school's dead gardener from the faculty and staff, as well as the students and their parents.

In the end, Darius tells his father he's tired of moving, Patricia's dad meets the husband of his former lover, getting closure, and the coroner finally takes away the dead gardener.