Is Friday the 13th actually an unlucky day?

How did Friday the 13th come to be considered unlucky? Why is 13 thought to be an unlucky number? Are superstitions real? For free home activities sign-up at www.WhoSmarted.com See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info .