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

Other days

youth

Youth Day
self appreciation

Self Appreciation Day
blanket fort

Blanket Fort Day
hannah

Hannah Day
offer

Offer Day
carpenters

Carpenters Day
ormille

Ormille Day
bounce

Bounce Day
polyamory

Polyamory Day
martini

Martini Day