That's the exact date when the Ford Ironman World Championships and religion collide because that day also happens to be Yom Kippur as well as next year's Kona championships.
For many jews (and of course triathletes of the jewish faith) Yom Kippur is one of the most sacred days of the year.
According to Wikipedia:
"Yom Kippur also known as the Day of Atonement, is one of the holiest days of the year for Jews. Its central themes are atonement and repentance. Jews traditionally observe this holy day with a 25-hour period of fasting and intensive prayer, often spending most of the day in synagogue services. Yom Kippur completes the annual period known in Judaism as the High Holy Days (or sometimes "the Days of Awe")."