Oops, it doesn't look like 'mass leaders day' is a national day..

Other days

coffee

Coffee Day
ask out your crush

Ask Out Your Crush Day
bubble bath

Bubble Bath Day
blanket fort

Blanket Fort Day
azonto is acceptable

Azonto Is Acceptable Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
offer

Offer Day
polyamory

Polyamory Day
stress awareness

Stress Awareness Day
special education

Special Education Day