Oops, it doesn't look like 'tell your snap to add me day' is a national day..

Other days

hoodie

Hoodie Day
healing

Healing Day
camera

Camera Day
comfy

Comfy Day
kale

Kale Day
pick me

Pick Me Day
unicorn

Unicorn Day
lash

Lash Day
lisp

Lisp Day
bow tie

Bow Tie Day