Today is Nelson Mandela International Day, as the anti-apartheid leader and former South African president turns 94 years old. The United Nations has backed Mandela’s call for citizens worldwide to do 67 minutes of voluntary work — to represent the 67 years Mandela devoted to South Africa’s political struggle. Ahead of celebrations in South Africa, Mandela’s wife, Graça Machel, said her husband is in good health.

Graça Machel: “He’s doing well after the crisis last year. How could you imagine that he would be so well? But he is — he recovered remarkably well, remarkably well. He’s a man of 94, but he’s fine.”