In a plugin I want to build, it deals with contests. A contest has a date on it. Does WordPress have a feature in it where it can run a piece of code every day without requiring someone to create a cron job? Basically I'm wondering if, when you build a blog with WordPress, if WordPress.org or Automattic automatically pings your site once a day or something like that. Because if that's true, I can hook that event and make it run a contest date check.