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

Other days

boba

Boba Day
boy friend

Boy Friend Day
artists

Artists Day
ask out your crush

Ask Out Your Crush Day
healing

Healing Day
self care

Self Care Day
martini

Martini Day
lisp

Lisp Day
ponytail

Ponytail Day
bubble bath

Bubble Bath Day