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

Other days

gum

Gum Day
kale

Kale Day
reading

Reading Day
special education

Special Education Day
tell a fairytale

Tell A Fairytale Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
singles

Singles Day
stress awareness

Stress Awareness Day
kiss a brunette

Kiss A Brunette Day
blanket fort

Blanket Fort Day