Alert Friggatriskaidekaphobics or those with the irrational fear of Friday the 13th. According to superstition, Friday the 13th is considered to be inauspicious. It's a date many consider to be the harbinger of bad luck. According to the Judas Theory, the 'unlucky' No. 13 idea is related to the idea that at the Last Supper, Judas -- the disciple who betrayed Jesus -- was the 13th to sit at the table. Jesus Christ was crucified on a Friday. Key events, many tragic, took place on Friday the 13th, among them the fall of the Aztec empire, Delhi's Uphaar Cinema fire tragedy in 1997 and the 2017 Paris attacks. A partial solar eclipse occurred this July 13th (Friday). The last Friday the 13th solar eclipse occurred in December 1974. The next Friday the 13th solar eclipse isn't until September 13, 2080. On average, a Friday the 13th occurs every 212.35 days The distribution of the 13th day over each Gregorian 400-year cycle (4,800 months) reveals 685 occurrences on a Monday, Tuesday (685), Wednesday (687), Thursday (684), Friday (688), Saturday (684) and Sunday (687). So, just get through today because the next Friday the 13th arrives in September 2019.