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

Other days

fiancee

Fiancee Day
self care

Self Care Day
brow

Brow Day
kiss a brunette

Kiss A Brunette Day
bounce

Bounce Day
china

China Day
singles

Singles Day
ask out your crush

Ask Out Your Crush Day
unicorn

Unicorn Day
stud

Stud Day