The New Founding Fathers of America known as the NFFA for short are the main antagonists of The Purge series. They're a political party who won the US election during an economic crisis. They invented the Purge when once a year all crime is legal for a night and emergency service are unavailable to fix the economic crisis and crime rates.
It happens once a year on 21st March and start at 7PM and finish at 7AM. That's basically 12 hours of lawlessness.
Is that like The Purge on Netflix? I think that idea of a Purge in the year never become a real rule because it is VERY unfair and cruel and that it does not solve the problems.