Nelson Mandela International Day (or Mandela Day) is an annual international day in honour of Nelson Mandela, celebrated each year on 18 July, Mandela’s birthday. The day was officially declared by the United Nations in November 2009, with the first UN Mandela Day held on 18 July 2010. However, other groups began celebrating Mandela Day on 18 July 2009.
Source: Wiki
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