July 18th is International Nelson Mandela Day. It's especially significant since the former South African president would have been a hundred years old this year. Thousands of people in Johannesburg have joined in various Mandela Day activities -- from feeding the homeless to donating books to community libraries. It's been a busy but proud day for South Africans, as they come together to do some good. CGTN's Vauldi Carelse reports from Johannesburg.

Johannesburg is a city usually bustling with economic activities. But today the atmosphere is different. Many people, in this city of more than 4 million, have taken time out to celebrate International Mandela Day. From handing out food parcels to launching an anti-poverty scheme. All to honour a man who would have been a hundred today.

TOKYO SEXWALE BUSINESSMAN "His legacy is that you stand up for what is right, human freedom, social justice and economic freedom, children's rights, women's rights. These are all the things that Madiba stands for and today and every year as we celebrate Mandela Day we keep that legacy in mind."

MARA LOUW ACTRESS "What he has taught most of us, I'd like to say what 'taught' means, is forgiveness and working hard not just for yourself but sacrificing yourself to help those in need, especially the poor, especially the children."

VAULDI CARELSE JOHANNESBURG, SOUTH AFRICA "It takes a quick visit to the Mandela house here in Vilakazi Street to see that the legacy he left will continue to be celebrated well beyond the events that are taking place today across South Africa and the world. People were urged to live the values he embodies."

"I celebrate Mandela Day by helping people and being kind to other people. I love Mandela. Freedom!"

"He's a world icon, he's not just for South Africa but for the world."

"We are gonna celebrate his birthday every day."

"Without Mandela we are not supposed to be here today, to be free."

"He's kind, brave and nice."

While there is some debate about how best to remember Mandela. One thing is clear: He still unites South Africans, and gives them a reason to celebrate. Vauldi Carelse, CGTN, Johannesburg, South Africa.