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

Other days

buddy

Buddy Day
one

One Day
law

Law Day
china

China Day
lumpy rug

Lumpy Rug Day
nae nae

Nae Nae Day
my little pony

My Little Pony Day
gallery

Gallery Day
boy friend

Boy Friend Day
bounce

Bounce Day