by Mike Krumboltz St. Patrick's Day is an incredibly popular holiday. After all, most holidays aren't 100% inclusive, but everybody's at least a little Irish on March 17. One of the holiday's most endearing symbols is, of course, the leprechaun . Not surprisingly, searches on the mythical creature are huge on St. Paddy's Day. For example, Web interest in " what is a leprechaun " and " who created leprechauns " are both up over 500% in the Search box.