Across the United States Nation many people will be taking to the streets to participate in a very traditional event known to many as the first original Labor Day. This event will spans many major cities and is a rally have have span across the Globe. 

International May Day Rally began with the United States labor movement in the late 19th Century. On May 1, 1886, unions across the country went on strike, demanding that the standard workday be shortened to eight hours. The organizers of these strikes included socialists, anarchists, and others in organized labor movements. Rioting in Chicago's Haymarket Square on May 4th including a bomb thrown by an anarchist led to the deaths of a dozen people (including several police officers) and the injury of over 100 more.
The protests were not immediately successful, but they proved effective down the line, as eight-hour work days eventually did become the norm. Labor leaders, socialists, and anarchists around the world took the American strikes and their fallout as a rallying point, choosing May Day as a day for demonstrations, parades, and speeches.(May Day
May Day continues to be the original Labor day and while many immigrants will be marching for labor and immigrants rights they will also be marching in solidarity for  "Black Lives Matter" in light of the recent race issues.

Below is are links to some May Day Rally Marches and their cause:

Besides the listed above they are many more cities participating. If you see one go by just jump on it!