Youth Day in the People's Republic of China is on May 4. It was established in December 1949 by the Government Administration Council to commemorate the beginning of the May Fourth Movement in 1919.

The May Fourth Movement was an anti-imperialist, cultural, and political movement growing out of student demonstrations in Beijing on May 4, 1919 protesting the Chinese government's weak response to the Treaty of Versailles, especially the Shandong Problem. These demonstrations sparked national protests and marked the upsurge of Chinese nationalism, a shift towards political mobilization and away from cultural activities, and a move towards populist base rather than intellectual elites.

The broader use of the term "May Fourth Movement" often refers to the period during 1915-1921 more usually called the New Culture Movement.