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

Other days

blanket fort

Blanket Fort Day
get funky

Get Funky Day
kale

Kale Day
comfy

Comfy Day
brow

Brow Day
aloxolt

Aloxolt Day
tell a fairytale

Tell A Fairytale Day
boy friend

Boy Friend Day
stud

Stud Day
ormille

Ormille Day