18 Years Worth of Days The average retirement lasts for 18 years. Are you prepared to fill that many days? Share | Have A Question About This Topic? Address Thank you! Oops! Related Contents Retirement Redefined Around the country, attitudes about retirement are shifting. The History of Retirement Do you know where the idea of “retirement” comes from? RE: Retirement How does your ideal retirement differ from reality, and what can we do to better align the two?