As former South African president Nelson Mandela turned 95 on Thursday, South Africans from all works of life came out in huge numbers to celebrate his birthday by spending 67 minutes of their time assisting the less privileged . Mandela's birthday, which falls on July 18, was declared in 2009 by the United Nations Assembly as the Nelson Mandela International Day. On this day, people from over the world are urged to spend 67 minutes of their time doing good things.