Oops, it doesn't look like 'cheese subjected to advanced interrogation techniques day' is a national day..

Other days

self care

Self Care Day
self appreciation

Self Appreciation Day
boy friend

Boy Friend Day
hoodie

Hoodie Day
eat what you want

Eat What You Want Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
artists

Artists Day
blanket fort

Blanket Fort Day
promposal

Promposal Day
lost sock memorial

Lost Sock Memorial Day