SleepingTime.org tells us about a particular user’s sleeping pattern, if their tweets are publicily available. This is done by analyzing the tweets of that user based on their timezone. All you have to do is enter a person’s Twitter username and you can get his sleeping time. Its rather a rough estimation taken from the time of the day when they are not tweeting. So with FourSquare you know where people are, with FourWhere you know where you should go and now with SleepingTime.org you get to know when people sleep! Now that all this information is available, whom is it going to help ?