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

Other days

bow tie

Bow Tie Day
hoodie

Hoodie Day
self care

Self Care Day
lisp

Lisp Day
nail polish

Nail Polish Day
prosecco

Prosecco Day
believe

Believe Day
martini

Martini Day
kiss a ginger

Kiss A Ginger Day
bounce

Bounce Day