Friday the 13th is considered unlucky because the Knights Templars were rounded up and executed/arrested across Europe on Papal orders on Friday the 13th, 1307.
Granted but why has the day stuck for 711 years ? Worse things have happened before and after . It was no 911
If you can't say paraskevidekatriaphobia without making yourself look like a twat then you have no right to fear Friday 13th
There were 13 people at the Last Supper (the 13th being Judas). Jesus was crucified on a Friday (supposedly).