Oops, it doesn't look like 'extra virgin olive oil day' is a national day..

Other days

polyamory

Polyamory Day
blanket fort

Blanket Fort Day
first love

First Love Day
singles

Singles Day
boy friend

Boy Friend Day
bow tie

Bow Tie Day
buddy

Buddy Day
get funky

Get Funky Day
cuddle up

Cuddle Up Day
coffee

Coffee Day