Oops, it doesn't look like 'pancake harry styles is a king day' is a national day..

Other days

Lumpy Rug Day

Chocolate Milkshake Day

Self Care Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Lost Sock Memorial Day

Unicorn Day

Polyamory Day

Carpenters Day

Embarrass Your Best Friend Day

China Day