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

Other days

hoodie

Hoodie Day
ruby

Ruby Day
emoji

Emoji Day
comfy

Comfy Day
tell a fairytale

Tell A Fairytale Day
bubble bath

Bubble Bath Day
bounce

Bounce Day
artists

Artists Day
ride the wind

Ride The Wind Day
brow

Brow Day