Yes it’s Friday the 13th. The Witches Sabbath, if you believe the Norse mythology. I find it interesting that it was the Christian coverts who decided that Frigga (the Norse goddess of love and fertility) was a witch. Another source of the superstition created by the extermination of the Knights Templar initiated by the Pope on October 13th, 1307. I don’t believe it’s unlucky, just another myth generated by religion and the church.