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

Other days

comfy

Comfy Day
buddy

Buddy Day
ruby

Ruby Day
girl friend

Girl Friend Day
kiss a brunette

Kiss A Brunette Day
cuddle up

Cuddle Up Day
hannah

Hannah Day
ponytail

Ponytail Day
bonang

Bonang Day
my little pony

My Little Pony Day