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Thousands of people celebrate the 95th birthday of "Father of the Nation" Nelson Mandela outside the Mediclinic Heart Hospital where he is being treated in Pretoria, South Africa, July 18, 2013.
The South African presidency has said that Mandela's health is "steadily improving," as the anti-apartheid icon spends his 95th birthday in the hospital.
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A group of kindergarten children sing Happy Birthday to Nelson Mandela outside the Mediclinic Heart Hospital in Pretoria, July 18, 2013.
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A well-wisher looks at a banner of photos of Nelson Mandela, outside the Mediclinic Heart Hospital, July 18, 2013.
South Africa celebrated Nelson Mandela's 95th birthday with acts of charity on Thursday.
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Schoolchildren sing "Happy Birthday" to Nelson Mandela at Phefeni High School, opposite Mandela's former home in Soweto Township in Johannesburg, July 18, 2013.
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A well-wisher holding balloons with the face of Nelson Mandela outside the Mediclinic Heart Hospital in Pretoria, July 18, 2013.
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A newspaper flysheet declares "Happy Birthday" to Nelson Mandela opposite Mandela's former home in Vilakazi Street, Soweto Township, July 18, 2013.
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Schoolchildren sing "Happy Birthday" to Nelson Mandela at Phefeni High School, Soweto Township, Johannesburg, July 18, 2013.
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Thousands of people celebrated Nelson Mandela's 95th birthday outside the Mediclinic Heart Hospital in Pretoria, July 18, 2013.
Christopher Furlong/Getty Images
Winnie Madikizela-Mandela, ex-wife of Nelson Mandela, stands with a giant birthday cake outside the Mediclinic Heart Hospital in Pretoria, July 18, 2013.
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A birthday card for Nelson Mandela made by young students from the Melpark Primary School in Johannesburg adorns a wall, July 18, 2013.
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Thousands of people celebrate Nelson Mandela's 95th birthday outside the Mediclinic Heart Hospital in Pretoria, July 18, 2013.
Christopher Furlong/Getty Images
Schoolchildren sing "Happy Birthday" to former South African President Nelson Mandela at Phefeni High School, Soweto Township, Johannesburg, July 18, 2013.
Christopher Furlong/Getty Images
Workers carry a portrait of Nelson Mandela as thousands of people celebrate the former president's 95th birthday outside the Mediclinic Heart Hospital in Pretoria, July 18, 2013.
Christopher Furlong/Getty Images
Children gather to celebrate Nelson Mandela's 95th birthday outside the Mediclinic Heart Hospital in Pretoria, July 18, 2013.
Ben Curtis/AP
A well-wisher with cake on his face smiles after a large birthday cake for Nelson Mandela was given out to the crowd gathered outside the gates of the Mediclinic Heart Hospital in Pretoria, July 18, 2013.
