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

Other days

comfy

Comfy Day
cuddle up

Cuddle Up Day
ruby

Ruby Day
chocolate milkshake

Chocolate Milkshake Day
singles

Singles Day
ask out your crush

Ask Out Your Crush Day
ormille

Ormille Day
artists

Artists Day
lash

Lash Day
coffee

Coffee Day