18 Years’ Worth of Days The average retirement lasts for 18 years, with many lasting even longer. Will you fill your post-retirement days with purpose? Share | Related Content Travel, Without the Baggage Tips to avoid checking in luggage on your next vacation. Understanding the Alternate Valuation Date Executors can value the estate on the date of death, or on its six-month anniversary —the “Alternate Valuation Date." Leaving Your Lasting Legacy Want to do more with your wealth? You might want to consider creating a charitable foundation.