William McKinley actually said...
I therefore order: That upon the arrival of the cortege at the National Cemetery at Arlington, all proper military and naval honors be paid to the dead heroes; that suitable ceremonies shall attend their interment; that the customary salute of mourning be fired at the cemetery, and that on the same day at two o'clock P.M., Thursday, the sixth day of April, the National ensign be displayed at half staff on all public buildings, forts, camps and public vessels of the United States, and that at twelve o'clock noon of said day all the Departments of the Government at Washington shall be closed.
04/02/1899