Oops, it doesn't look like 'no shoes in the snow day' is a national day..

Other days

aloxolt

Aloxolt Day
slime

Slime Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
blanket fort

Blanket Fort Day
martini

Martini Day
nail polish

Nail Polish Day
hiv awareness

Hiv Awareness Day
special education

Special Education Day
unicorn

Unicorn Day
ask out your crush

Ask Out Your Crush Day