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

Other days

one

One Day
stud

Stud Day
promposal

Promposal Day
cursing

Cursing Day
my little pony

My Little Pony Day
boy friend

Boy Friend Day
lisp

Lisp Day
boba

Boba Day
self appreciation

Self Appreciation Day
ponytail

Ponytail Day