Son Sann
In the PRK, the full title of the event was 'Day of Hatred against the genocidal Pol Pot-Ieng Sary-Khieu Samphan clique and the Sihanouk-Son Sann reactionary groups'. The National Day of Hatred was an important holiday in the PRK, and the Kampuchean United Front for National Construction and Defense mobilized Kampuchean mass organizations to ensure popular participation.