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

Other days

pick me

Pick Me Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
boyfriend

Boyfriend Day
gum

Gum Day
boba

Boba Day
blanket fort

Blanket Fort Day
stress awareness

Stress Awareness Day
ruby

Ruby Day
azonto is acceptable

Azonto Is Acceptable Day
lumpy rug

Lumpy Rug Day