A day of prayer for permanent peace (Proclamation for May 25) -- 11 a.m. -- National moment of remembrance

Today, we rededicate ourselves to commitments equal to the caliber of those who have rendered the highest service:  to support our troops with the resources they need to do their jobs; to never stop searching for those who have gone missing or are prisoners of war; to ensure all our veterans have access to the care and benefits they have earned and deserve; and to continue our constant work of building a Nation worthy of the heroes we honor today.
In honor of all of our fallen service members, the Congress, by a joint resolution approved May 11, 1950, as amended (36 U.S.C. 116), has requested the President issue a proclamation calling on the people of the United States to observe each Memorial Day as a day of prayer for permanent peace and designating a period on that day when the people of the United States might unite in prayer.  The Congress, by Public Law 106-579, has also designated 3:00 p.m. local time on that day as a time for all Americans to observe, in their own way, the National Moment of Remembrance.

NOW, THEREFORE, I, BARACK OBAMA, President of the United States of America, do hereby proclaim Memorial Day, May 25, 2015, as a day of prayer for permanent peace, and I designate the hour beginning in each locality at 11:00 a.m. of that day as a time during which people may unite in prayer. 

I also ask all Americans to observe the National Moment of Remembrance beginning at 3:00 p.m. local time on Memorial Day. I request the Governors of the United States and its Territories, and the appropriate officials of all units of government, to direct that the flag be flown at half-staff until noon on this Memorial Day on all buildings, grounds, and naval vessels throughout the United States and in all areas under its jurisdiction and control.  I also request the people of the United States to display the flag at half-staff from their homes for the customary forenoon period.

https://www.whitehouse.gov/the-press-office/2015/05/22/presidential-proclamation-prayer-peace-memorial-day-2015