'The Day of Seven Billion', October 31, 2011, is the day that has been officially designated by the United Nations Population Fund (UNFPA) as the approximate day on which the world's population reached seven billion people. https://www.youtube.com/watch?v=sc4HxPxNrZ0 The World had already reached a population of five billion on July 11th, 1987, and six billion, twelve years later ...