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

Other days

stud

Stud Day
self appreciation

Self Appreciation Day
book

Book Day
hoodie

Hoodie Day
artists

Artists Day
eat what you want

Eat What You Want Day
nae nae

Nae Nae Day
slime

Slime Day
cursing

Cursing Day
ruby

Ruby Day