Labour Day, known as Workers' Day in Bulgaria, is celebrated every year on the 1st of May. It is an official public holiday, which means many people have the day off work to participate in the festivities. This holiday gives the working class a chance to reflect on their rights and achievements and to advocate for further protections and improvements in their workplace conditions. There are various public events, rallies, and demonstrations across the country, particularly in the cities.

The celebration of Labour Day in Bulgaria dates back to the socialist period when it was a significant event on the national calendar. It was a day used to highlight the achievements of the working class, and people participated in mass gatherings and processions. Nowadays, while the nation's history and its challenges are respectfully remembered, Labour Day is also marked by picnics, outdoor concerts, and family outings as people enjoy the day off work.

Despite being a day of relaxation and leisure for many, Labour Day also serves as a reminder of Bulgaria’s historical and ongoing labour struggles. Groups, labour unions, and political parties often organize parades, rallies, and speeches to highlight issues such as workers' rights, fair wages, and decent conditions. Many Bulgarians also use Labour Day as an opportunity to highlight important social issues and advocate for change, making it a significant event in the country's socio-political calendar.