13 and Friday the 13th
The number 13 has always been and is still considered to be sinister by many. For some, going to office or carrying out any auspicious task is out of the question on the 13th day of a month. Many others consider only Friday the 13th to be inauspicious. Friday the 13th's bad reputation goes back to the days when under pressure from King Philip IV of France, Pope Clement V had ordered his men to capture and burn all the Templar knights, a brigade of powerful crusaders who the king felt were a threat to him.