Labour Day is a public holiday honoring the many achievements of labor unions since the 1800s — in particular, the 8 hour working day. Reasonable wages, breaks, and paid vacation are all important to a fair and healthy economy. In some places, people spend the day protesting current labor conditions, attending public demonstrations, and events. Others attend festivals, concerts, or get together with family and friends. Some just spend the day not working.
The day originated in the United States during the Labour Movement that started in the state of Illinois. Now, it's observed in over 90 countries worldwide.