The day that the legendary character Faust, from hit game series Guilty Gear, is globally recognised, celebrated and worshipped.
It is celebrated on the 19th of February - the first celebration will commence in the year 2025. This year will be known as 0 FY (Faust Year - like years being BC/AD because of Jesus).
It is required to listen to Alone Infection at least once during this day, if you wish you to celebrate (you don't have a choice (Mini Faust will hunt you down))
"what day is it?"
"I got meteors fuck you die, also it's Faust day."