International Solidarity Day of laborers is the holiday celebrated on the 1 of May or the first Monday in May in 142 countries, including Ukraine.
Celebrating the 1st of May is a glorious tradition of working people around the world. It all began on May 1, 1886, when American workers in Chicago organized a demonstration demanding the normal working conditions and, above all, establishing an 8-hour workday. However, the demonstration was canceled by the police. After that, the II International Congress of Paris in July 1889 decided to celebrate this day every year as proof of unity of all workers of the planet, their common interests in the struggle for better life of the workers.
May 1 was the holiday of spring, joy, success and achievements in building a new society. Workers continue to celebrate May Day since those times.