Chicago Mayor Richard M. Daley, who has presided over the nation’s third-largest city for 21 years, like his father did before him, announced Tuesday that he will not run for a seventh term, saying the time “just feels right.”

Daley, 68, said he’d been thinking about not running for several months and became comfortable with his decision over the last several weeks.

“It just feels right,” Daley said at a news conference, his smiling wife Maggie standing by his side. “I’ve always believed that every person, especially public officials, must understand when it’s time to move on. For me, that time is now.”