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

Other days

My Little Pony Day

Ponytail Day

China Day

Cuddle Up Day

Martini Day

Blanket Fort Day

Frozen Yogurt Day

Chocolate Milkshake Day

Ride The Wind Day

African Immigrant And Refugee Hiv And Hep Awareness Day