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

Other days

polyamory

Polyamory Day

coffee

Coffee Day

believe

Believe Day

bow tie

Bow Tie Day

Emoji Day

gallery

Gallery Day

lisp

Lisp Day

african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day

stress awareness

Stress Awareness Day

artists

Artists Day