Oops, it doesn't look like 'return and exchange day' is a national day..

Other days

aloxolt

Aloxolt Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
ask out your crush

Ask Out Your Crush Day
ponytail

Ponytail Day
slime

Slime Day
hiv awareness

Hiv Awareness Day
comfy

Comfy Day
lash

Lash Day
prescription drug take back

Prescription Drug Take Back Day
cuddle up

Cuddle Up Day