Flag Etiquette · Half-Staff September 11 Flag Rules Answered by Al Cavalari · The Flag Guys · Posted 1996, still relevant September 11 Related questions 9/11 Flag Display Etiquette When is the Flag Automatically Half-Staffed? Have a question Al didn't answer? Call (845) 562-0088 — real people answer the phone. Mon–Fri 9:00 AM – 5:00 PM ET. ← Back to all flag etiquette questions