India, May 24 -- May 26 will be observed as the Memorial Day in the United States, commemorating the men and women who died while in the military service. In their honor, there are certain rules that need to be followed while flying the national flag atop public and federal buildings.

According to the US Flag Code, "On Memorial Day, the flag is displayed at half-staff until noon and at full staff from noon to sunset". After noon, the flag will again be flown at full staff.

Chicago's official site also highlights the codes in this aspect. The site reads, "The American flag is flown at half-staff on Memorial Day until noon as a visible sign of mourning and remembrance for the men and women who died while serving in the U.S. armed forces. ...