Why is it the "working" people rally on a workday?

MoveOn wants us to rally on April 4th. Only trouble is - real working folks likely have jobs to go to that day:
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Dear MoveOn member,

April 4, 2011 is shaping up to be one of the most important progressive days of action in nearly a decade.

It's the anniversary of the assassination of Martin Luther King Jr., who was killed 43 years ago while traveling to Memphis to stand in solidarity with striking sanitation workers demanding their chance to attain the American Dream.

Now, in response to the new wave of Republican attacks on unions and working people, the entire labor movement has called for a massive national day of protests, vigils, and work site events on April 4. Virtually the entire progressive movement has joined in.

Can you help make next Monday an overwhelming day of solidarity for working people by attending an event in your area? Click here to find the April 4 event closest to you: 

http://local.we-r-1.org/

Working people in Wisconsin, Ohio, and Indiana have inspired an activist spirit that's spreading across the country, and this is our chance to keep the momentum going. This is our chance to stand up to the Republicans and demand protection for workers' rights and the restoration of the American Dream for all of us.

The events are part of "We Are One," a grassroots effort led by a broad coalition of unions and progressive allies committed to realizing Dr. King's goal of economic justice for all. The events include actions, teach-ins, work site discussions, vigils, faith events, and more.

You can simply attend an event in your area or if you have creative ideas for an event in a public place like a park, in your work site, a teach-in at a college near you, or even something at your house, you can volunteer to host your own.

We need to keep building our strength until the American Dream can finally be attained by everyone. On April 4, we will keep the momentum going. And we will not stop.

Will you join us?

http://local.we-r-1.org/

Thanks for all you do.

–Daniel, Justin, Julia, Robin, and the rest of the team  
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Their grass has synthetic roots...and MLK was Republican, I read...he's probably rolling in his grave at the thought of these commies taking his name in vain. The workers he was supporting were truly oppressed, unlike their whining modern namesakes.