Legal analysis: it is generally not illegal for schools not to have a holiday during May Day, but violations can be reported to the Education Bureau. Statutory holidays belong to workers' rest time, but employers can arrange workers to work on statutory holidays after consultation with trade unions and workers according to the needs of production and operation.

Legal basis: Article 3 of the Labor Law of People's Republic of China (PRC) enjoys equal employment and choice of occupation, labor remuneration, rest and vacation, labor safety and health protection, vocational skills training, social insurance and welfare, labor dispute settlement and other labor rights stipulated by law.

Laborers should complete labor tasks, improve their professional skills, implement labor safety and health laws and regulations, and observe labor discipline and professional ethics.

Article 6 The personnel department and labor and social security department of the local people's government at or above the county level shall, according to their functions and powers, take the initiative to supervise and inspect the implementation of these Regulations.

Trade unions shall safeguard employees' annual leave rights according to law.