Oops, it doesn't look like 'Clam On The Half Shell Tater day' is a national day..

Other days

african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
polyamory

Polyamory Day
lost sock memorial

Lost Sock Memorial Day
singles

Singles Day
self care

Self Care Day
blanket fort

Blanket Fort Day
hiv awareness

Hiv Awareness Day
aloxolt

Aloxolt Day
bonang

Bonang Day
artists

Artists Day