Web alarm clock for 7:28 a.m.
As you hand the school-ceremony trip to another adult, set the alarm for 7:28 am so the changeover does not swallow the departure check. Tell them what is already packed, where the uniform pieces are, and when you expect them to leave. That keeps the household moving toward the flag ceremony without treating 8:00 am as extra preparation time.
Because the school-ceremony handoff depends on this alert, leave the alarm page open and keep the phone awake until it sounds. Closing the tab or browser cancels the browser alarm, while a sleeping phone may prevent it from ringing; the person taking over could then miss the cue to gather the child and head out. Keep the volume audible, and use a separate alarm if you cannot keep the page active.
Before the early household rush spreads from one room to another, agree on who responds when 7:28 am arrives. Keep shoes, school ID, bag, and any ceremony items together near the door, then ask everyone else to leave the bathroom and breakfast area clear for the child. A quiet alert or vibration may spare sleeping family members, but the adult taking over should still be able to notice it immediately.