Oops, it doesn't look like 'offend someone then take it back day' is a national day..

Other days

Lisp Day

Healing Day

Chocolate Milkshake Day

Buddy Day

African Immigrant And Refugee Hiv And Hep Awareness Day

Book Day

Frozen Yogurt Day

Bow Tie Day

Azonto Is Acceptable Day

Tell A Fairytale Day