In Utah, it is an Infraction (punishable by a fine up to $750) to light fireworks prior to the three days before the Fourth of July or Pioneer Day, and three days after Fourth of July or Pioneer Day. That means you can light fireworks from July 1 through July 7 and July 21 through July 27. Most nights, with the exception of the Fourth and the 24th, you must stop setting off your pyrotechnics by 11:00 p.m. On the Fourth and the 24th, you have until midnight.
So, friends, put away the lighters and the fireworks. At least until July 21.