Event organizer Ken Croken says the law reduced time for early voting, limited locations for ballot drop boxes, and shortened hours on election day.
"You know voting is one of our most sacred rights as Americans and government should be doing everything possible to make access to the ballot easier not more restrictive."
He believes the Iowa law will make it especially difficult for the elderly and people with mobility problems. Plus fewer hours for voting will make it harder for everyone to go to the polls.
Backers of the Iowa voting law say it ensures what they call "voter integrity," and it was passed soon after record voter turnout in the 2020 election.
The anniversary event, focusing on the importance of voting and the need for passage of federal voting rights, will be held on Sunday afternoon at 3 pm, at the King Interpretive Center in Davenport (501 Brady Street).