Cuatro de Mayo
In 1939, to commemorate the 20th anniversary of the May Fourth Movement, the Shaan-Gan-Ning Border Region Northwestern Youth National Aid Association decided to make May 4 China's Youth Day. Mao Zedong wrote an article praising the May Fourth Movement, and the same year, the Republic of China government designated May 4 as Youth Day. On May 4, 1939, the Kuomintang and the Communists both celebrated the first May Fourth Youth Day.