A day of celebration of LeBron James' talents in which individuals leave the work day 12 minutes early. Initially celebrated on June 13th, 2011- a day after LeBron James failed to show up to work in the 4th quarter for the sixth game in a row against Dallas.
Ryan: Hey man, you staying till 5?
Ross: No dude, It's LeBron James Day. Work ends 12 minutes early today.