I couldn't find the exact date where Green Day was formed, what I found was October 17th 1987. Their first concert ever at Rod's Hickory Pit in Vallejo, California. They were known as Sweet Children back then.
The period between 1870 and 1900 in the United States is known as the “Gilded Age” and was characterized by economic and industrial growth, increased political participation, immigration, and social reform.
Most of those enslaved in the North did not live in large communities, as they did in the mid-Atlantic colonies and the South. Those Southern economies depended upon people enslaved at plantations to provide labor and keep the massive tobacco and rice farms running.