Oops, it doesn't look like 'beer hangover day' is a national day..

Other days

stress awareness

Stress Awareness Day

unicorn

Unicorn Day

chocolate milkshake

Chocolate Milkshake Day

boba

Boba Day

hot chocolate

Hot Chocolate Day

african immigrant and refugee hiv and hep awareness

African Immigrant And Refugee Hiv And Hep Awareness Day

nail polish

Nail Polish Day

cat girl

Cat Girl Day

bow tie

Bow Tie Day

Me Day