Marches, rallies, prayer vigils and voter registration drives are planned across California as activists hope to shape the national immigration debate.
The events Wednesday will coincide with a demonstration in Washington, D.C., calling on Congress to pass comprehensive immigration reform.
The agricultural town of Hollister in Northern California will see a pro-immigrant candlelight vigil.
Organizers plan a drive to get people to register to vote in San Bernardino.
And a gathering in San Diego is being billed as marking "Undocumented Coming Out Day."
Events are also planned for San Francisco, Los Angeles, San Jose, Fresno and Bakersfield.