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

Other days

frozen yogurt

Frozen Yogurt Day
boba

Boba Day
cat girl

Cat Girl Day
pick me

Pick Me Day
cuddle up

Cuddle Up Day
brow

Brow Day
nae nae

Nae Nae Day
nail polish

Nail Polish Day
camera

Camera Day
ponytail

Ponytail Day