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

Other days

frozen yogurt

Frozen Yogurt Day
bonang

Bonang Day
artists

Artists Day
eat what you want

Eat What You Want Day
girl friend

Girl Friend Day
bounce

Bounce Day
one

One Day
slime

Slime Day
cursing

Cursing Day
lash

Lash Day