What happened on friday the 13th to make it unlucky?

The superstition around this day is thought to have come about during the Middle Ages, and may have Biblical origins.

Some historians have claimed it was the day on which Eve bit the apple from the Tree of Knowledge, the great flood began and the builders of the Tower of Babel.

n the New Testament there were 13 people present for Jesus's last supper on Maundy Thursday, the day before Christ's crucifixion on Good Friday.

these are some biblical reasons