Oops, it doesn't look like 'show him what kind of panties you wore to work day' is a national day..

Other days

Fiancee Day

Aloxolt Day

Donate Your Hair Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Pampering Day

Kiss A Ginger Day

Promposal Day

Stress Awareness Day

Lash Day

Raise Awerness Of Zeus Day