Moment of silence
A moment of silence is the expression for a period of silent contemplation, prayer, reflection, or meditation. Similar to flying a flag at half-mast, a moment of silence is often a gesture of respect, particularly in mourning for those who have recently died or as part of a commemoration ceremony of a tragic historical event. One minute is a common length of time for the commemoration, though other periods of time may be chosen, normally connected in some way with the event being commemorated (there might be a minute given for every death commemorated, for example). During the moment of silence, participants may typically bow their heads, remove hats, and refrain from speaking or moving places for the duration. A person officiating or presiding over the gathering will be responsible for the declaring and timing of the period of silence.