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

Other days

Fiancee Day

One Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Hiv Awareness Day

My Little Pony Day

Ride The Wind Day

Ormille Day

Kiss A Brunette Day

Nail Polish Day

Hoodie Day