Oops, it doesn't look like 'who really cares day' is a national day..

Other days

lash

Lash Day
cursing

Cursing Day
bounce

Bounce Day
girl friend

Girl Friend Day
coffee

Coffee Day
nae nae

Nae Nae Day
prosecco

Prosecco Day
bow tie

Bow Tie Day
ruby

Ruby Day
latina equal pay

Latina Equal Pay Day