Definitely rated NOT FOR BUCK but quite a strange movie. It's "13/13/13" by Asylum of "Sharknado" fame and available in HD on Netflix. It's a horror film about the 13th month which occurs because we weren't supposed to have leap years. What happens is everyone goes crazy except for people who were born on February 29th. Rated not for Buck due to excessive violence and use of the "F" word (they must have set a new record). It's a direct to video production for Asylum who often do schlock films for Syfy. This one would have wound up being a succession of "bleep" if shown on Syfy. Dark movie but in many ways the craziness was hilarious and you need a taste cheesy horror flims.
http://movies.netflix.com/WiMovie/13_13_13/70285997