11 September 11th.
Why it should be a public holiday: To give the day its due weight and allow people to dutifully and properly memorialize what happened… can feel a bit uncouth to conduct typical business on this day.
Why it should not be a public holiday: Americans aren’t particularly experienced at somber days of remembrance and would most likely, eventually, turn it into a day of barbecues and three-day weekend trips to Mexico… we really don’t need September 11th turning into a day of mattress sales.