There were 13 people, 12 Apostles plus Jesus. "I believe the reason that 13 is considered to be unlucky is b ecause it was a patriarchal thing where women have 13 menstrual cycles in a year.

The number 13 has long been viewed with suspicion due to its irregularity. In many ancient cultures, the number 12 was seen as a symbol of completeness—12 months in a year, 12 zodiac signs, 12 ...