Never let the date phase me..other than to freak people out by telling them that 13 was my lucky number and that I have good luck on the 13th.
As far as religious significance, I feel it is a misconception that Christian feel it is unlucky. Being a Christian, I cannot see how I could view it as "evil"...after all the 12 disciples plus Christ equals 13.
Yes, DC you should start a religion thread--excellent idea. I have always been fascinated about other religions especially Druidism. And I feel you will discover that there are a wide scope of Christians with very conflicting beliefs