Oops, it doesn't look like 'live by the harmless untruths that make you happy day' is a national day..

Other days

Chocolate Milkshake Day

Slime Day

Bubble Bath Day

Azonto Is Acceptable Day

Kiss A Brunette Day

First Love Day

Lisp Day

Polyamory Day

Fiancee Day

Appreciate Yaself A Lil Extra Day