Oops, it doesn't look like 'piss janna off day' is a national day..

Other days

coffee

Coffee Day
eat what you want

Eat What You Want Day
camera

Camera Day
comfy

Comfy Day
lost sock memorial

Lost Sock Memorial Day
cursing

Cursing Day
law

Law Day
book

Book Day
self care

Self Care Day
fiancee

Fiancee Day