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

Other days

youth

Youth Day
hot chocolate

Hot Chocolate Day
unicorn

Unicorn Day
bonang

Bonang Day
boy friend

Boy Friend Day
latina equal pay

Latina Equal Pay Day
stress awareness

Stress Awareness Day
blanket fort

Blanket Fort Day
me

Me Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day