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

Other days

carpenters

Carpenters Day
one

One Day
self care

Self Care Day
blanket fort

Blanket Fort Day
boba

Boba Day
stud

Stud Day
kale

Kale Day
hannah

Hannah Day
comfy

Comfy Day
tell a fairytale

Tell A Fairytale Day