<P> On October 1 , 2005 , Facebook expanded to twenty - one universities in the United Kingdom and others around the world . Facebook launched a high school version in September 2005 , which Zuckerberg called the next logical step . At that time , high school networks required an invitation to join . Facebook later expanded membership eligibility to employees of several companies , including Apple Inc. and Microsoft . On December 11 , 2005 , universities in Australia and New Zealand were added to the Facebook network , bringing its size to 2,000 + colleges and 25,000 + high schools throughout the United States , Canada , Mexico , the United Kingdom , Australia , New Zealand , and Ireland . Facebook was then opened on September 26 , 2006 to everyone aged 13 and older with a valid e-mail address . </P>
<P> On October 1 , 2005 , Facebook expanded to twenty - one universities in the United Kingdom and others around the world . Facebook launched a high school version in September 2005 , which Zuckerberg called the next logical step . At that time , high school networks required an invitation to join . Facebook later expanded membership eligibility to employees of several companies , including Apple Inc. and Microsoft . On December 11 , 2005 , universities in Australia and New Zealand were added to the Facebook network , bringing its size to 2,000 + colleges and 25,000 + high schools throughout the United States , Canada , Mexico , the United Kingdom , Australia , New Zealand , and Ireland . Facebook was then opened on September 26 , 2006 to everyone aged 13 and older with a valid e-mail address . </P>
when was facebook first opened to the public
when was facebook first opened to the public
September 26 , 2006
September 26 , 2006