Movies like zero day

Zero Day is a 2003 American film directed by Ben Coccio and starring Andre Keuck and Cal Robertson. The plot concerns a school shooting. It was inspired by the 1999 Columbine High School massacre.

Andre Kriegman and Calvin Gabriel (loosely based on Eric Harris and Dylan Klebold) announce their intention to attack their school, Iroquois High School, calling their plan "Zero Day". They keep a video diary on the camera, carefully hiding their plans from their friends and families. The majority of the film is portrayed through their video filming, and shows them planning, preparing, and mentioning some of their motives.

Other scenes show the two attending Andre's birthday party, egging the house of someone they dislike, and Cal going to the prom while Andre works at a pizza place. In one video entry, Cal notes the origin of the name "Zero Day": Cal and Andre originally planned to attack on the first day on which the temperature dropped to zero degrees after they had finished their preparations. This plan soon proved impractical, and they set May 1, 2001 as the new date. Wanting their attack to have a memorable name, they agreed to keep the original title.