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

Other days

ponytail

Ponytail Day
coffee

Coffee Day
frozen yogurt

Frozen Yogurt Day
bow tie

Bow Tie Day
bounce

Bounce Day
buddy

Buddy Day
lash

Lash Day
promposal

Promposal Day
latina equal pay

Latina Equal Pay Day
lumpy rug

Lumpy Rug Day