Who issued the proclamation stating when to fly the flag half staff when did it happen?

The proclamation to fly the flag at half-staff is typically issued by the President of the United States or a state governor. This action is often taken to honor the memory of individuals who have passed away or to mark significant national tragedies. Such proclamations can occur at various times throughout the year, depending on the circumstances. Specific examples include the national observance for the passing of notable figures or in response to events like mass shootings.