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

Other days

tell a fairytale

Tell A Fairytale Day
boy friend

Boy Friend Day
cat girl

Cat Girl Day
bounce

Bounce Day
reading

Reading Day
blanket fort

Blanket Fort Day
kale

Kale Day
cuddle up

Cuddle Up Day
unicorn

Unicorn Day
nae nae

Nae Nae Day