by Vera H-C Chan Whenever a Friday the 13th approaches, a mild case of triskaidekaphobia , aka fear of the number 13, hits Yahoo! searches. In these rational times, though, Friday the 13th doesn't pack the paralyzing punch it used to. In fact, as recent queries reveal, the date usually becomes more of an excuse to brainstorm " friday the 13th party ideas ," host a marathon of " friday the 13th movies ," and maybe toy with the idea of inking " friday the 13th tattoos .