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

Other days

Tell Ur Crush You Like Them Day

Carpenters Day

Chocolate Milkshake Day

My Little Pony Day

Hiv Awareness Day

Gallery Day

Emoji Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Boba Day

Buddy Day