This is not an entirely official holiday but seeing as how it was created by the Cookie Monster it seems a bit more valid than many others under the banner of official. Cookie Monster dubbed December 4th National Cookie Day back in the 1980 edition of the Sesame Street Dictionary. It’s official enough for me. So be it Chocolate Chip, Peanut Butter, Snicker Doodles, Sugar or whatever particular disc of delicious is your preferred cookie of choice…get some or make some and celebrate in accordance with the wishes of Mr. Monster. This guy knows cookies.