To get the accurate time of day, call the United States Naval Observatory at 202-762-1401 or 202-762-1069. The USNO primary master clock is located in Washington, D.C. and the times given are in Eastern Standard time.
The United States Naval Observatory's alternate master clock is located in Colorado Springs, Colorado and can be reached by calling 719-567-6742. The voice announcer for this number gives the time adjusted for the Mountain Standard time zone. If a phone is unavailable, the accurate time for every time zone in the United States is available on the Time.gov. or Time.is websites.