FILE - In this March 7, 1979, file photo, United Farm Workers President Cesar Chavez talks to striking Salinas Valley farmworkers during a large rally in Salinas, Calif. California and several other states will honor Chavez by closing schools and state offices Friday, March 31,. 2017, the 90th anniversary of the birth of a man who went from a grape and cotton picker to an enduring hero for laborers, Latinos and justice seekers of all kinds. Farmworkers in four states plan to march Saturday and Sunday in honor of Chavez, who died in 1993, and in protest of President Donald Trump’s immigration policies. (AP Photo/Paul Sakuma)