Injury Nashru Day is celebrated on October 7th every year! It's kind of like the Ferris Bueller of holidays. Injury Nashu is your day... a day of fun... when anything can happen, so long as no one gets hurt in the process.
Rule #1 of Injury Nashru Day is that you must eat chocolate chip cookies.
Rule #2 of Injury Nashru Day is that you can only celebrate it if everybody feels good.
Rule #3 of Injury Nashru Day is that you "do all kinds of different stuff".