International Labour Day 2024 Date and Theme: International Labour Day, also known as May Day or Workers Day, is annually observed on May 1 in more than 80 countries, including India, Cuba, China, and many others. International Labour Day 2024: Date, history, significance of day and more International Labour Day: Labour Day is celebrated every year on May 1 to mark the struggle and contribution of workers and working-class people. On International Labour Day 2024, we celebrate the contributions and achievements of workers worldwide. This day honors the labor movement's struggles for fair wages, better working conditions, and social justice. International Labour Day 2024: From date to significance, here's all that you need to know about Labour Day.