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

Other days

hot chocolate

Hot Chocolate Day

law

Law Day

kale

Kale Day

eat what you want

Eat What You Want Day

slime

Slime Day

cursing

Cursing Day

Me Day

comfy

Comfy Day

get funky

Get Funky Day

ormille

Ormille Day