a always and controversial movie like this have mixed review . you either love it or you hate it and and not everyone will like this movie . this show the perspective of the killer and which be something i personally feel be something important to consider . you may hate them and you may claim to understand them and feel a though you can relate and but regardless this movie will make you think about school shooting from a different perspective . the movie be shoot entirely use a hand hold camera and something that i think work quite well a it make it more realistic . it be tell completely from the killer point of view and from their mission to family outing and all lead up the big day zero day in which they be plan on a massacre at their school . zero day do not offer answer and but merely present a glimpse at the life of two troubled young boy and let the audience decide for themselves . our feeling towards the boy be something mixed between sympathy and hatred and but yet we be leave confused a to why two ordinary young boy would do such a thing . they be show to be surprisingly normal and typical teenage boy lead ordinary life and and if we do not know what they be plan we wouldn not expect a thing ( they make it clear throughout the whole movie that no one else know about their plan ) the acting be extremely good consider the two actor be complete unknown . we can only hope to see more work from the both of them in the future . despite how this be a fictionalized movie and one can not help but notice the obvious similarity to columbine . calvin and andre be scarily similar to eric harris and dylan klebold and ( not so much in look and but in manner ) a someone who have research columbine very extensively and i could see the similarity and it be almost certainly base on it . the actual massacre be show through surveillance camera at the school and be one of the most chilling thing i have ever see . i be completely in shock after see it and and it a feeling that stay around for a while . it be very realistic and well do and and it be very difficult to watch . all in all zero day be an excellent movie and and i think everyone should at least check it out . in the past and we have always simply branded killer psychopath and assume that either they be biologically wire for disaster or have medium influence and but a zero day show sometimes the motif be deep than that and and we can never truly understand why tragedy such a school shooting happen until we have see it from the perspective of the killer .