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

Other days

self care

Self Care Day
aloxolt

Aloxolt Day
bow tie

Bow Tie Day
believe

Believe Day
tell a fairytale

Tell A Fairytale Day
hoodie

Hoodie Day
pumpkin

Pumpkin Day
bounce

Bounce Day
fiancee

Fiancee Day
buddy

Buddy Day