It’s a whopper of a public relations blunder.

Speakers for Right Nation 2010’s “evening extravaganza” on September 18th at the 10,000-seat Sears Centre Arena in Hoffman Estates include Glenn Beck, gubernatorial candidate Bill Brady, blogger Andrew Breitbart, Rep. Aaron Schock, former House Majority Leader Dick Armey, John Moore of The Wall Street Journal, and Tea Party leader Herman Cain.

One problem: the evening convention, which follows an afternoon “activist training conference” for conservatives at the nearby Marriot Chicago Northwest, is on Yom Kippur, the holiest of the Jewish High Holy Days.

Right Nation spokesman Collin Corbett told me that the plans were made almost a year ago. Organizers wanted Glenn Beck as the keynoter, and September 18th was the date he was available. Corbett said that all efforts are being made to accommodate Jewish people who might like to attend. The holiday ends at sundown; Beck will probably take the stage at around 8:30 pm.

Beck’s huge rally on the steps of the Lincoln Memorial in D.C. last saturday came on the 47th anniversary of Martin Luther King Jr.’s March on Washington and his “I Have a Dream” speech, which King delivered from the same spot in 1968. Beck has said he has no idea the dates overlapped when he scheduled the event. He called his selection of the date and site “divine intervention.”

According to Right Nation 2010’s website, the event in “President Obama’s hometown” is aimed at “conservatives, Republicans and Tea Party Independents.” The organizers—the event is “facilitated” by the United Republican Fund—promise that “tens of thousands of patriots throughout the Midwest will come together to celebrate their shared lineage and common purpose.”