Oops, it doesn't look like 'change your wiper blades day' is a national day..

Other days

stress awareness

Stress Awareness Day
buddy

Buddy Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
hiv awareness

Hiv Awareness Day
donate your hair

Donate Your Hair Day
pick me

Pick Me Day
hannah

Hannah Day
camera

Camera Day
tulip

Tulip Day
self appreciation

Self Appreciation Day