Oops, it doesn't look like 'married guy take a woman alone to dinner day' is a national day..

Other days

Embarrass Your Best Friend Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Pumpkin Day

Ride The Wind Day

Polyamory Day

Fiancee Day

Law Day

Eat What You Want Day

Aloxolt Day

Slime Day