21h 6min, may 28, 1963 y - Buddhist Crisis
Description:
 Period of political and religious tension in South Vietnam between May and November 1963, characterized by a series of repressive acts by the South Vietnamese government and a campaign of civil resistance, led mainly by Buddhist monks.
Diem (leader of the South) pavoured Catholics and not the Buddhists, which led to their persecution. 
Added to timeline:
Date:
21h 6min, may 28, 1963 y
Now
 ~ 62 years ago