Oops, it doesn't look like 'create a vacuum thank a mailman day' is a national day..

Other days

fiancee

Fiancee Day
prescription drug take back

Prescription Drug Take Back Day
african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day
boyfriend

Boyfriend Day
offer

Offer Day
carpenters

Carpenters Day
promposal

Promposal Day
me

Me Day
latina equal pay

Latina Equal Pay Day
bow tie

Bow Tie Day