Democratic National Convention organizers unveiled more details Monday about their four-day presidential nominating event, announcing the daily themes that will accompany the prime-time keynote speakers.

The first official day of the convention, which takes place in Denver Aug. 25-28, will focus on the theme “One Nation” and feature an address by Michelle Obama, wife of the Democratic presidential hopeful. Tuesday’s topic will be “Renewing America’s Promise,” headlined with a speech by former presidential contender Sen. Hillary Rodham Clinton (D-N.Y.). Wednesday’s theme will be “Securing America’s Future,” which will be highlighted by a speech from the yet-to-be-named vice presidential candidate.

Finally, Sen. Barack Obama (D-Ill.) will stick to his familiar “Change You Can Believe In” mantra when he takes to the podium on Thursday night at Denver’s Invesco Field at Mile High to deliver his acceptance speech before an expected crowd of 70,000.

In announcing the latest pieces of the Democratic convention plans, Co-Chairwoman Gov. Kathleen Sebelius of Kansas said: “The 2008 convention is about ensuring that those peoples’ voices be heard and their call for change is heeded. From Monday through Thursday, our convention program will highlight the people of this country who want positive change and who believe Barack Obama is the leader who will listen to their concerns and get our country moving in the right direction again.”