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

Other days

boba

Boba Day
bow tie

Bow Tie Day
pumpkin

Pumpkin Day
gum

Gum Day
ask out your crush

Ask Out Your Crush Day
first love

First Love Day
lash

Lash Day
boy friend

Boy Friend Day
offer

Offer Day
gallery

Gallery Day