Oops, it doesn't look like 'foolish day' is a national day..

Other days

eat what you want

Eat What You Want Day
girl friend

Girl Friend Day
get funky

Get Funky Day
first love

First Love Day
ponytail

Ponytail Day
offer

Offer Day
singles

Singles Day
china

China Day
pick me

Pick Me Day
nae nae

Nae Nae Day