Oops, it doesn't look like 'association of husbands and boyfriends have declared a day' is a national day..

Other days

Lash Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Latina Equal Pay Day

Prosecco Day

Lumpy Rug Day

Believe Day

Nae Nae Day

Ponytail Day

Stud Day

China Day