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

Other days

one

One Day
ponytail

Ponytail Day
tell a fairytale

Tell A Fairytale Day
frozen yogurt

Frozen Yogurt Day
book

Book Day
cursing

Cursing Day
kiss a ginger

Kiss A Ginger Day
lumpy rug

Lumpy Rug Day
boba

Boba Day
cat girl

Cat Girl Day