Tim Day is making a second run for the Ward 5 seat. (Tim Day for Ward 5)

Day filed to enter the race Friday, shortly after announcing his intentions on NewsChannel 8’s NewsTalk program.

“I have to do this,” he said Friday afternoon. “I have to show there are honest, ethical people who understand processes and will do the right things. ... I’m the honest, ethical guy who brings a new, fresh perspective on how we can spend our money without wasting it.”

Day said he plans to run a campaign focused on ethical and fiscal issues.

His entry into the race comes after some thought. He said shortly after Thomas’s resignation that he was unsure of whether he would enter the race. Asked if he would run as a Republican, as he did when he ran against Thomas in 2010, he said, “that’s an interesting question.”(He garnered only 6 percent of the vote in his previous race.)

But Day indeed filed as a Republican on Tuesday. He is the only declared GOP candidate in a heavily Democratic ward, but the crowded field of 19 and his notoriety from the Thomas affair stand to make him a competitive candidate.

Day said there was little point in changing parties: “No matter what my party affiliation is on paper, as it stands today, people know me as a Republican and that’s not going to change,” he said. “They need to look at who Tim is and what he’s done ... and forget about the R after my name.”

The election is set for May 15; to appear on the ballot, candidates must gather 500 signatures from registered Ward 5 voters by Feb. 15.