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

Other days

nae nae

Nae Nae Day
nail polish

Nail Polish Day
my little pony

My Little Pony Day
pampering

Pampering Day
coffee

Coffee Day
pick me

Pick Me Day
artists

Artists Day
comfy

Comfy Day
china

China Day
carpenters

Carpenters Day