It's May Day, and that means it's also time for the annual May Day immigration march in downtown Los Angeles. This year's theme: "Together We Fight Back."

It kicks off Tuesday at noon, with people gathering starting at 11 a.m. But another pre-march rally gets started early — 5 a.m., running until 7 a.m.

The march's organizers say that the march is to "urge Angelenos to fight back attacks on workers, families, and communities by the Trump Administration." There are three main issues they're seeking to promote, according to the Los Angeles May Day Coalition:

1) Defend, protect, and respect worker rights
2) Fight against the anti-immigrant agenda and stop the cruel separation of families by ICE
3) Underline the importance of civic engagement in this year's mid-term elections

Rallies will be held at both ends of the march — one in front of the Immigration Family Court to kick off the march, with a short rally in front of the Edward Roybal Federal Building at the end. It's set to end at 255 E. Temple Street in front of the "Molecule Man" sculpture at 2:30 p.m.

The event features numerous organizers and dignitaries, including California state Sen. Kevin de Leon, who's also running for the U.S. Senate.

May Day marches for immigration in Los Angeles began in 2000, with the date chose to coincide with International Workers' Day, which is celebrated around the world. The number of marchers have bbed and flowed, with a couple thousand some years up to hundreds of thousands who rallied for immigration reform in 2006.

At 2017's march, Trump supporters held their own counter-protest in downtown L.A.