Oops, it doesn't look like 'sandwich this penis between your boobs day' is a national day..

Other days

hoodie

Hoodie Day
stress awareness

Stress Awareness Day
blanket fort

Blanket Fort Day
polyamory

Polyamory Day
bow tie

Bow Tie Day
bonang

Bonang Day
chocolate milkshake

Chocolate Milkshake Day
promposal

Promposal Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
nail polish

Nail Polish Day