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

Other days

china

China Day

slime

Slime Day

tell ur crush you like them

Tell Ur Crush You Like Them Day

hiv awareness

Hiv Awareness Day

ponytail

Ponytail Day

boy friend

Boy Friend Day

mean girls

Mean Girls Day

african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day

blanket fort

Blanket Fort Day

Emoji Day