五一劳动节用英文要说成May Day。

May Day is a significant international workers' holiday celebrated on the first day of May. It is a time to honor the contributions of workers and to advocate for better working conditions and workers' rights. The origins of May Day can be traced back to the labor movement of the late 19th century, when workers organized protests and strikes to demand an eight-hour workday and other labor reforms. Today, May Day is observed in many countries around the world, often with parades, demonstrations, and other events that highlight the importance of workers' rights and social justice. In some places, it is also a day for general celebration and community gatherings. May Day serves as a reminder of the ongoing struggle for workers' rights and the need to support and respect the labor movement.