The National Moment of Remembrance encourages all Americans to pause wherever they are located at 3:00 pm local time on Memorial Day. All in the country are asked for one minute of silence to remember and honor those who have died in service to the US. The Moment does not replace traditional Memorial Day events; rather, it is an act of national unity.

For one day in the year, it's good to remember that people will pay the ultimate price to be an American. After the Civil War, General John A. Logan called for a holiday to commemorate fallen soldiers. He wanted the holiday to be observed every May 30th, but due to Uniform Monday (a holiday we did not get off), the holiday was moved to the last Monday of May. On December 28, 2000, President Bill Clinton designated 3 p.m. local time on Memorial Day as a National Moment of Remembrance. It is hoped that each and every American will take a moment to remember those who have lost their lives in war.

More Info: en.wikipedia.org