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

Other days

lash

Lash Day
ride the wind

Ride The Wind Day
promposal

Promposal Day
lumpy rug

Lumpy Rug Day
gum

Gum Day
frozen yogurt

Frozen Yogurt Day
tell a fairytale

Tell A Fairytale Day
lisp

Lisp Day
tulip

Tulip Day
book

Book Day