Why is Friday the thirteenth taken into consideration to carry awful luck?

On thirteen October 1307, through order of the French King Philip the Beautiful and with the Pope's consent, have been arrested hundreds of participants of the Christian Order of the Templars.

Subjected to the torture they "confess" that they're heretics and later are burned on the stake.

In fact, the King’s purpose changed into to damage the Templar Order due to the fact he owed them a big amount of money and confiscate their homes in France. It became Friday the thirteenth and on account that then at the moment is taken into consideration to convey terrible luck.