Oops, it doesn't look like 'parkgood morning and happy hump day' is a national day..

Other days

african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
stress awareness

Stress Awareness Day
boy friend

Boy Friend Day
gallery

Gallery Day
frozen yogurt

Frozen Yogurt Day
carpenters

Carpenters Day
singles

Singles Day
special education

Special Education Day
blanket fort

Blanket Fort Day
bow tie

Bow Tie Day