[[quoteright:242:http://static.tvtropes.org/pmwiki/pub/images/rsz_zero_day_film_3151.jpg]]
->'''''Andre Kriegman:''' Ready?\\
'''Cal Gabriel:''' Aim...''
-->—The words which marked the beginning of the massacre.

A 2003 film directed by Ben Coccio which shares a great number of similarities with the UsefulNotes/{{Columbine}} High School massacre. The film itself is presented in the form of video diaries recorded by the future gunmen, seniors Andre Kriegman and Calvin Gabriel. The recordings document the preparation and rather vague explanations given by the two, as well as seemingly random family scenes and events.

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!!This film provides examples of:

* AllThereInTheManual: Additional information about the setting, main characters and the shooting itself and its aftermath could be found on the now defunct official website of the film. The website was made to look like the official police report of the event and contained a step-by-step account of the attack, the name of the victims and the shooters' profiles.
* ArtifactTitle: An in-universe variation; Andre and Cal dub the name of their massacre "[[TitleDrop Zero Day]]" because they plan to have it occur on a day where the temperature is zero degrees. They later set the day of the massacre to be on May Day, as on the one day of the year it was zero degrees outside, Andre was sick and couldn't launch the attack.
* BetterToDieThanBeKilled: The shooters decide they want to die on their own terms, not killed by the police forces.
* BewareTheNiceOnes: Cal is portrayed as a gentle, shy and meek boy in his recorded material. The high school security cameras, however, capture a sadistic, violent, irritable and merciless teenager.
* BigShutUp: Andre and Cal scream at a wounded girl to shut up during the massacre.
* BlackDudeDiesFirst: One of the first people to die in the shooting is black.
* CityWithNoName: The main character's hometown and high school remain unnamed throughout the story, possibly to give the impression that such things can happen anywhere.
* DeadpanSnarker: Andre cracks jokes quite a bit, even when killing people.
* {{Deconstruction}}: One prevalent idea about school shootings is that perpetrators are mentally unstable and abnormal freaks who did what they did because of violent music, videogames, neglectful parents, bullying or a combination of any of the aforementioned factors. The film takes this idea and tears it apart. The main characters look like perfectly normal teenage boys: they are intelligent, funny and good-looking, their regular clothes do not attract attention and their parents are loving and caring, if a little out of touch with them. The [[AllThereInTheManual official website]] even reported that they had a decent sized circle of friends and were on good terms with many other students and that they were not singled out for bullying. Before their Zero Day, the boys decide to burn their possessions (books, cds, dvds, videogames, notes) because they knew that everybody will scrutinize their belongings after their death and end up saying that they did it because they were influenced by violent music, games etc. They insist that Zero Day was their idea, and that nobody influenced them.
* DissonantSerenity: The boys talk about their murderous plan with a chilling calmness and even smile as they either point the gun towards the unseen audience or talk about the devastating effects their rampage will have on the community.
* DownerEnding: Considering the topic of the film, it's not surprising at all.
* {{Egging}}: Andre and Cal egg house of Brad Huff, although the original plan was to egg his car.
* EvenEvilHasLovedOnes: Andre and Cal apologize to their parents for their actions in their second to last tape.
* EvilGloating: Andre and Cal gloat as they prepare to shoot the other students.
* FaceOfAnAngelMindOfADemon: Cal, with his bright blond hair and boyish looks. Andre even teases him about it.
* {{Foreshadowing}}: The teenagers drop hints that only the audience, who is aware of their plan, can comprehend. For example, in the graveyard episode, Cal [[SarcasticConfession jokingly says that he has an evil inside which he locks away and keeps from everyone]].
* FoundFootageFilms: The whole film is based on the videos made by Cal and Andre, with the exception of the shooting itself, which is shown from the high school security cameras.
* FreudianExcuse: Andre and Cal indicate that the massacre is due to the bullying they've gone through at school.
* TheGhost: Brad Huff, the JerkJock that the two shooters hate the most, never appears on screen.
* HorrorDoesntSettleForSimpleTuesday: The shooting takes place on May Day.
* ICallItVera: "I call it Malayna."
* {{Improv}}: The actors were encouraged to improvise throughout the filming of the movie.
* JerkJock: Brad, one of the students whom the main characters hate the most.
* KarmaHoudini: The main characters think JerkJock Brad Huff is one because he drinks and drives all the time and gets pulled over quite often, and yet never loses his license.
* MeaningfulName: Andre's last name is Kriegman, which is German for "man of war". Calvin's last name is Gabriel, which could be a reference to his angelic appearance.
* MurderSuicide: Andre and Cal kill themselves after gunning down a dozen of their classmates.
* NewMediaAreEvil / MurderSimulators: Defied. Andre and Cal burn all their movies, games, and books, because they know that their massacre will be blamed on their choice of media instead of themselves. They want Zero Day to be ''their own'' plan and nobody else's.
* NietzscheWannabe: ''We're all animals.''
* OneWayTrip: Cal is fully aware that he's going to leave the school in a black body bag. Andre does not share this view in the beginning, but later realizes there is no way they can escape.
* PointOfNoReturn: Andre jokingly says "Shit, now we have to do it" after he and Cal burn all their games, movies, and books.
* RedOniBlueOni: The two perpetrators are opposites in terms of looks and personality, with Andre being the red oni and Cal the blue one. Even their portraits are color-coded as such.
* {{Revenge}}: The gunmen's desire for revenge appears to stem from the fact that they were bullied, although to what extent is never shown aside from a short clip at the beginning.
* RippedFromTheHeadlines: The film was inspired by the famous [[UsefulNotes/{{Columbine}} Harris/Klebold]] basement tapes. It contains certain similar scenes, such as when the main characters go over their arsenal or when they go to target practice.
** During target practice, one of the minor characters says that Cal is a natural. To his comment, Andre adds the words ''natural selection'', which Eric Harris, one of the Columbine shooters, believed in a [[TheSocialDarwinist Social Darwinist]] variant of. The day of the massacre, Harris wore a white T-shirt with the words printed on it.
* {{Samurai}}: One of the main characters considers himself a kind of high school samurai.
* ShoutOut: When Andre and Calvin are burning all their possessions, a copy of VideoGame/HalfLife and Literature/LordOfTheFlies are prominently featured.
** When Andre and Cal are looking over the guns Andre's father owns, Andre refers to one of the revolvers as a "''Film/DirtyHarry'' gun".
** Andre brings a TeenageMutantNinjaTurtles doll to shoot during target practice.
* SuicideByCop: Averted. Andre contemplates doing this, but is talked out of it by Cal.
* TeensAreMonsters: The shooters themselves.
* VideoWills: The final tape recorded by the main characters can be seen as this.
* WellIntentionedExtremist: The main characters claim that they're going to go to their school and kill as many fellow students as they can in order to give a wake-up call to the community and to teach people what they should value. At one point, Andre defines that as the most ''respectful'' and ''caring'' thing someone could do.
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