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

Other days

self appreciation

Self Appreciation Day
eat what you want

Eat What You Want Day
book

Book Day
kale

Kale Day
fiancee

Fiancee Day
ruby

Ruby Day
hannah

Hannah Day
nae nae

Nae Nae Day
tulip

Tulip Day
stud

Stud Day