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

Other days

self appreciation

Self Appreciation Day
eat what you want

Eat What You Want Day
ponytail

Ponytail Day
first love

First Love Day
emoji

Emoji Day
lisp

Lisp Day
boba

Boba Day
bow tie

Bow Tie Day
offer

Offer Day
comfy

Comfy Day