There's some serious symbolism here.
The release date is fitting.
7/1/2016 = 7+1+20+16 = 44
That date can also be written 1/7.
Keep in mind the movie is about legalized killing.
In the film the 'purge' dates are March 21 and March 22, or 21/3 and 22/3.
We have covered extensively what '213' has to do with 'killing', as well as 'Nimrod', the first Freemason. We have also covered the connection of '223' to Freemasonry and the false Jews, the same ones who control Hollywood.