I found a few interesting things on wikipedia about Friday 13th.
Rate of accidents
There are conflicting studies about the risk of accidents on Friday the 13th. The Dutch Centre for Insurance Statistics (CVS) on June 12, 2008, stated
that "fewer accidents and reports of fire and theft occur when the 13th of the month falls on a Friday than on other Fridays, because people are
preventatively more careful or just stay home. Statistically speaking, driving is slightly safer on Friday the 13th, at least in the Netherlands; in
the last two years, Dutch insurers received reports of an average 7,800 traffic accidents each Friday; but the average figure when the 13th fell on a
Friday was just 7,500. However, a 1993 study in the British Medical Journal that compared the ratio of traffic accidents between Friday the 6th and
Friday the 13th stated that there is a significant increase in traffic-related accidents on Friday the 13th. There are indications that there are more
accidents on Fridays than average weekdays (irrespective of the date) probably because of alcohol consumption. Therefore it is less relevant for this
purpose to compare Friday the 13th with, say, Tuesday the 13th.
LINK:
en.wikipedia.org...
Also came across this to, 2012 is the only leap year with three occurrences of Friday the 13th, each three months apart: in January, April, and
July.
[edit on 9/8/10 by boo1981]