When did South Korea first have a peaceful transfer of presidential power?

In the history of South Korea, the first peaceful transfer of presidential power occurred in February 1988, when Roh Tae-Woo was inaugurated as president.1

Following widespread popular dissatisfaction with the government in 1987, a program of constitutional reforms was announced to restore democratic institutions, including the direct popular election of the president. Roh, a former army general, won the subsequent election in December 1987 and took office the following February, marking the first time in South Korean history that power was transferred peacefully.1