The Washington, DC M Street Social Security Administration office has relocated to 1300 D St. SW. Office hours at the new location will remain the same: 9 a.m. to 4 p.m., Mondays, Tuesdays, Thursdays and Fridays; and 9 a.m. to noon on Wednesdays. People age 18 and older may sign up for a My Social Security account at socialsecurity.gov.