Oops, it doesn't look like 'celebration of brexit and lets replace it with a remembrance day' is a national day..

Other days

Tell Ur Crush You Like Them Day

Blanket Fort Day

Ponytail Day

Camera Day

Martini Day

Gum Day

Fiancee Day

Bubble Bath Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Azonto Is Acceptable Day