Oops, it doesn't look like 'wave to a cat day' is a national day..

Other days

get funky

Get Funky Day
prosecco

Prosecco Day
tell a fairytale

Tell A Fairytale Day
blanket fort

Blanket Fort Day
hoodie

Hoodie Day
china

China Day
nae nae

Nae Nae Day
bonang

Bonang Day
cat girl

Cat Girl Day
youth

Youth Day