Oops, it doesn't look like 'tweet about clouds day' is a national day..

Other days

get funky

Get Funky Day
boy friend

Boy Friend Day
lash

Lash Day
bonang

Bonang Day
hannah

Hannah Day
my little pony

My Little Pony Day
china

China Day
gum

Gum Day
lisp

Lisp Day
frozen yogurt

Frozen Yogurt Day