Oops, it doesn't look like 'tip your fav sw day' is a national day..

Other days

boyfriend

Boyfriend Day
cuddle up

Cuddle Up Day
blanket fort

Blanket Fort Day
gum

Gum Day
comfy

Comfy Day
brow

Brow Day
buddy

Buddy Day
donate your hair

Donate Your Hair Day
singles

Singles Day
offer

Offer Day