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

Other days

law

Law Day
buddy

Buddy Day
singles

Singles Day
coffee

Coffee Day
pampering

Pampering Day
my little pony

My Little Pony Day
cuddle up

Cuddle Up Day
stud

Stud Day
latina equal pay

Latina Equal Pay Day
ride the wind

Ride The Wind Day