National Day of Remembrance ( ) , formerly called the National Day of Hatred , which falls on May 20 , is an annual event in Cambodia . It commemorates the Cambodian genocide of the Khmer Rouge regime that ruled the country between 1975 and 1979 . It became a national holiday in 2018 . The English name ' Day of Hatred ' is somewhat of a mistranslation . The Khmer name , when instituted in 1983 , was ទិវាចងកំហឹង – '' Ti Veer Jrong Komhuoeng '' ( ' Day of Tying Anger ' ) . The name could also be translated as ' Day of Maintaining Rage '
Cambodian genocide
Cambodian genocide
National Day of Remembrance (Cambodia)