Oops, it doesn't look like 'would a have a field day' is a national day..

Other days

slime

Slime Day
comfy

Comfy Day
tell ur crush you like them

Tell Ur Crush You Like Them Day
lash

Lash Day
hiv awareness

Hiv Awareness Day
special education

Special Education Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
boba

Boba Day
prescription drug take back

Prescription Drug Take Back Day
reading

Reading Day