Oops, it doesn't look like 'assembly to commence sitting for the day' is a national day..

Other days

Martini Day

Raise Awerness Of Zeus Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Polyamory Day

Tell Ur Crush You Like Them Day

Bonang Day

Latina Equal Pay Day

Girl Friend Day

Boba Day

Pick Me Day