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

Other days

tulip

Tulip Day
lisp

Lisp Day
hoodie

Hoodie Day
get funky

Get Funky Day
fiancee

Fiancee Day
stud

Stud Day
youth

Youth Day
self appreciation

Self Appreciation Day
boy friend

Boy Friend Day
pampering

Pampering Day