From WENN.com

The former South African President turns 94 on Wednesday (18Jul12) and celebrities are campaigning for their fans to undertake 67 minutes of public service to mark his 67 years of philanthropic work.

The date is internationally recognised as Mandela Day, and Izzard is adamant the world should join together in a show of unity to celebrate the famed activist.

He says, ""Nelson Mandela is my greatest inspiration and on July 18th, his 94th birthday, is still a shining example to the world of what is possible. That is why I am joining millions building his legacy - Nelson Mandela's global movement for good at www.MandelaDayPledge.org. I urge you to do likewise.""