Over one billion people used Facebook in just one day for the very first time. The CEO of Facebook, Mark Zuckerberg, said it was an important achievement. He posted on his own Facebook profile that: "We just passed an important milestone. For the first time ever, one billion people used Facebook in a single day." He said that on Monday, "one in seven people on Earth used Facebook to connect with their friends and family". He added that: "It's just the beginning of connecting the whole world." He also said a connected world, "brings stronger relationships with those you love".
Zuckerberg created Facebook in 2004 when he was a student. It quickly became one of the biggest sites in the world. It now has nearly 1.5 billion users and that number will grow. In October 2012, Facebook had one billion users who used the site once a month or more. Today, the site gets one billion visitors in just one day. Zuckerberg said Facebook must grow a lot in countries where it isn't so popular, such as in many African and Asian countries and in South America. Facebook has made Zuckerberg the ninth richest person in the world. He is 31 years old.