first proposed by organized U.S. workers in the late 19th century, the day has been little noted in the United States; we are not accustomed to honoring labor.
One of the gifts of our large immigrant population has been the return of May Day to prominence. Some of the largest demonstrations in recent years were the 2006 May Day marches led by thousands of Latinx workers who came out of the shadows to demand immigration reform and a path to citizenship for undocumented persons. Half a million marched in Los Angeles and hundreds of thousands in aggregate all over the country.
atmosphere of excited anticipation there was in the air before the 2006 marches. What with Trump's turning the Immigration and Customs Enforcement (ICE) and the Customs and Border Protection (CBP) into a thuggish deportation force, no wonder.
For more information about broad national May Day demonstrations, enter a zip code here. For national general strike information, use this link. And in the Bay Area, ABC7news has a good list of local activities.