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

Other days

brow

Brow Day
nae nae

Nae Nae Day
ask out your crush

Ask Out Your Crush Day
cuddle up

Cuddle Up Day
pumpkin

Pumpkin Day
self appreciation

Self Appreciation Day
kale

Kale Day
prosecco

Prosecco Day
youth

Youth Day
ponytail

Ponytail Day