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

Other days

slime

Slime Day
bow tie

Bow Tie Day
ask out your crush

Ask Out Your Crush Day
bounce

Bounce Day
ponytail

Ponytail Day
hannah

Hannah Day
buddy

Buddy Day
artists

Artists Day
hoodie

Hoodie Day
martini

Martini Day