Today would have been Nelson Mandela's 99th birthday and many are marking the occasion with celebrations.
Mandela Day marks the work that the equality campaigner did and also encourages people to continue his work.
The Mandela Day website is asking people to take steps to make positive differences to other people's lives, as the man himself said "it is in your hands to make of the world a better place."
Many on Twitter have been sharing inspirational quotes and celebrating the life of Mandela.
See the reaction below