Oops, it doesn't look like 'oyster rockefeller day' is a national day..

Other days

tell ur crush you like them

Tell Ur Crush You Like Them Day
kale

Kale Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
blanket fort

Blanket Fort Day
slime

Slime Day
gum

Gum Day
buddy

Buddy Day
carpenters

Carpenters Day
hiv awareness

Hiv Awareness Day
hannah

Hannah Day