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

Other days

martini

Martini Day
pick me

Pick Me Day
fiancee

Fiancee Day
stud

Stud Day
eat what you want

Eat What You Want Day
self care

Self Care Day
bow tie

Bow Tie Day
nail polish

Nail Polish Day
blanket fort

Blanket Fort Day
camera

Camera Day