Oops, it doesn't look like 'autoresponder appreciation day' is a national day..

Other days

african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
lumpy rug

Lumpy Rug Day
chocolate milkshake

Chocolate Milkshake Day
comfy

Comfy Day
donate your hair

Donate Your Hair Day
hiv awareness

Hiv Awareness Day
blanket fort

Blanket Fort Day
promposal

Promposal Day
buddy

Buddy Day
prescription drug take back

Prescription Drug Take Back Day