There is a lot to be told about red hair. Some facts and myths can be found here.
However, the best source that we found on the internet is here:
Wikipedia on red hair
it even has an entry on the festival!
Wikipedia on redhead day
A 2002 study found that Redheads are harder to sedate than any other people requiring twenty percent more anesthesia. Inadequate doses cause people to wake up during surgery and have increased recall of procedures.
Adults have about 120,000 hairs on their head; redheads have fewer, blondes have more, brunettes have the most.
There are two kinds of Redheads, says Mary Spillane, managing director of British image consultants Colour Me Beautiful. There is "the autumn type with hazel eyes," and the Celtic type with translucent skin, light eyes and carrot top -- leprechaun redness "that people have trouble with.
One medical importance of red hair is that individuals with red hair are, on average,
more likely to burn in the sun and they are
at an increased risk of skin cancer.
A French Proverb states that: `redheaded women are either violent or false, and usually are both`.
During the Spanish Inquisition flame colored hair was evidence that its owner had stolen the fire of hell and had to be burned as a witch.
Eves` red hair is seen as the stain of sin like the original scarlet letter. Later her son, Cain, will bare the red hair and also a fall from grace.
Redheads don`t turn grey. Red hair turns sandy, then white.
Redheads have always been thought untrustworthy. As some claim ? Judas was red-haired.
It brings you good luck to rub your hand on a Redhead`s head
Bees sting Redheads more often.