When are U.S. flags flown at half-mast?

The practice of flying the U.S. flag at half-mast is a significant gesture used to honor and pay respects. This action is typically reserved for occasions when the nation is mourning the loss of prominent leaders, such as a sitting president or other high-ranking officials, as well as for tragic events that deeply affect the public, such as mass tragedies or the loss of military personnel.

When the flag is flown at half-mast, it symbolizes a period of mourning and reflection. This protocol is established by the President of the United States or a state governor and follows specific guidelines regarding when and how long flags should be lowered. It serves as a powerful reminder of the nation's values and collective grief in times of sorrow.

The other choices do not align with the protocol for half-masting. National holidays often involve the flag being flown at full staff, military parades typically showcase flags at full-staff to honor the military and the nation, and there is no practice of lowering the flag at sunset as a standard procedure. Thus, the correct response reflects the solemn and respectful tradition associated with half-masting the flag.