Amusingly, the page on the fear of 13 makes an absolutely absurd claim about this holiday:
Ancient Persians believed the twelve constellations in the Zodiac controlled the months of the year, and each ruled the earth for a thousand years, at the end of which the sky and earth collapsed in chaos. Therefore, the number is identified with chaos and the reason Persians leave their houses to avoid bad luck on the thirteenth day of the Persian Calendar, a tradition called Sizdah Bedar.
Amazing how it can link to a page which completely contradicts the claim. 184.108.40.206 (talk) 08:01, 2 August 2014 (UTC)