February 4th 2004: Facebook founded
On this day in 2004 the social networking site Facebook was founded by Mark Zuckerberg. It was founded by Zuckerberg with his college roommates and fellow Harvard students Eduardo Saverin, Dustin Moskovitz and Chris Hughes. It was initially limited to just Harvard students but soon expanded to other universities, then high school students and finally, anyone aged 13 and over. It quickly became one of the most used social networking sites and one of the most influential websites in history. As of January 2012, Facebook had over 800 million active users worldwide.