On this day: Nelson Mandela was born in 1918
July 18 marks the birth, in 1918, of Nelson Rolihlahla Mandela in the village of Mvezo in South Africa's Eastern Cape. The date was formally designated Nelson Mandela International Day by the United Nations in 2009 and is now marked around the world each year.
Mandela was born into the Thembu royal family and, after training as a lawyer, joined the African National Congress (ANC) in the 1940s. Over the following decades he became one of the leading figures in organised opposition to apartheid, the system of racial segregation that was then official South African government policy.
Arrested in 1962, Mandela was tried on charges of sabotage and conspiracy to overthrow the government, and was sentenced to life imprisonment in 1964. He spent 27 years in prison, much of it on Robben Island, and during that time became one of the most recognised symbols of the international anti-apartheid movement.
Mandela was released from prison in 1990 by then State President F.W. de Klerk. Following his release, he played a central role in negotiations to end apartheid, a process that culminated in South Africa's first democratic elections open to citizens of all races in 1994.
In those 1994 elections, Mandela was elected South Africa's first Black head of state and served until 1999. As president, he prioritised policies aimed at national reconciliation, including institutions such as the Truth and Reconciliation Commission, which historians regard as an influential model in the field of transitional justice.
Mandela and de Klerk jointly received the Nobel Peace Prize in 1993 for their efforts to bring about a peaceful end to apartheid. Mandela is widely remembered internationally as a symbol of reconciliation, forgiveness, and political transition.
When the United Nations designated July 18 as Nelson Mandela International Day in 2009, citing the date as his birthday, the resolution highlighted his contribution to "the culture of peace and freedom." The day is marked by official ceremonies as well as a symbolic practice encouraging individuals to contribute to community service.
That practice asks participants to devote 67 minutes of the day, a figure symbolising the roughly 67 years Mandela spent in public service, to volunteer community work. The idea has been adopted by schools, civil society organisations, and institutions worldwide.
When assessing Mandela's legacy, historians commonly highlight two elements in particular: his choice of reconciliation over retribution despite years of imprisonment, and his decision to step down after a single term in office once elected. Many historians regard that second decision as an important precedent for stability in democratic transitions.
Mandela died in 2013, but his birthday on July 18 continues to serve as a global day of reflection on his life and legacy, making him one of relatively few historical figures invoked as a reference point across different societies' efforts at reconciliation and transformation.
Read next
8 of history's greatest unsolved mysteries, from Jack the Ripper to the Princes in the Tower
Despite decades of forensic techniques and new archival finds, these eight cases remain among history's genuinely unsolved puzzles. From the identity of Jack the Ripper to the fate of the Princes in the Tower, none has ever been definitively settled.
On this day: IBM launches the PC that defined personal computing (1981)
On August 12, 1981, IBM unveiled the IBM Personal Computer (IBM 5150) at a press conference in New York. Departing from its usual fully proprietary approach to move fast, the company built it from outside-sourced parts with an open architecture — a machine that quickly became the corporate standard for personal computing.
How did Christianity conquer the Roman Empire?
A small Jewish sect that emerged on the margins of the Roman world in the first century AD became the empire's official religion within three centuries. Historians examine why Christianity survived and spread when so many other cults and belief systems did not.
On this day: remembering Robin Williams, August 11, 2014
On August 11, 2014, American actor and comedian Robin Williams — who made generations of audiences laugh and cry — died at the age of 63. Across a career spanning more than four decades on stage and screen, he left a mark that keeps him remembered as one of cinema's most beloved figures.
The many lives of libraries: how they shaped civilization across centuries
From ancient royal archives to today's digital repositories, libraries have shaped culture, politics, and public life for millennia. Their history reveals how access to knowledge has always been intertwined with power.