Its a day where you slap someone named Arson / Mio. For example:
âHey Arson, do you know what day it is today?â âNo?â âItâs national slap arson dayâ *slaps arson*
National slap arson day is on April 15th. For example:
âHey Arson, you know what day it is right?â âNoâ âitâs national slap Arson day.â *slaps arson flat handed in face