There are three known “days’, and as a result, a little confusion. We have Frankenstein Friday, National Frankenstein Day, and Frankenstein Day. Let’s clarify these days for you……. Frankenstein Day is on August 30. This day is in honor of author Mary Wollenstone Shelley who was born on August 30,1797. She wrote the book “Frankenstein “in 1818. This day in in honor of her birth. Frankenstein Friday is the last Friday in October. Originally, we traced some references back to a website on Frankenberry cereal, which suggests a commercial origin. Recently, the creator came forward and told us about this special day that he created. More on Frankenstein Friday. National Frankenstein Day Google posts this as October 29th. We have not been able to verify that this as a true National Day. Our latest research suggests this day is really Frankenstein Friday. Are you still confused? Then, do what we do and celebrate all three days!