Oops, it doesn't look like 'vanilla milkshake ice cream soda hollerincontest day' is a national day..

Other days

Fiancee Day

Polyamory Day

Girl Friend Day

Tell Ur Crush You Like Them Day

Get Funky Day

Martini Day

Nail Polish Day

Self Care Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Lisp Day