Thousands will take to the streets of Sacramento and the world to continue the battle for labor rights on Monday.

Known as May Day, or International Workers Day, this tradition has stayed consistent for over 130 years, reflecting on strides made by leaders from Cesar Chavez to Upton Sinclair.

These leaders are celebrated because of the contributions to progress and growth they have made, like with Chavez's work with grape fields and Sinclair's muckraking in Chicago's meatpacking industry.

Al Rojas and Rosario Ramirez are leading the MayDay March in Sacramento. They discuss the history behind it and the battles for workers ahead.