The world has been taken over by a powerful and authoritarian regime that has a monopoly on military might. It is backed by the only worldwide legal religion that justifies the fascist regime. It teaches a philosophy that supports social order and harmony, while persecuting dissent. Humanity is inherently evil, and indulgence is a sin against God. Suppressing human emotions is necessary to maintain order in society.
The government and the faith work together to instill this belief. Cameras and other surveillance devices are placed where crime is thought to most likely occur, with some being seen and others hidden. Crime is met with harsh punishment, often a horrifyingly brutal death sentence or some form of mutilation. Gestapo like police forces roam the streets, and are given carte blanche authority to enforce the laws of the regime.
However, the authority and its religion realizes that human nature cannot be completely suppressed or controlled. They have instituted a law that creates a day in which there are no laws. Surveillance is shut down, as well as law enforcement. All acts of violence are allowed within a specific time frame, but government officials are exempt and protected. People are allowed to release their vile urges for that one day, with God turning a blind eye to their crimes.
Are there certain "rules" that need to be created during this purge like event to keep society sustainable?