The use of fireworks is allowed ONLY July 1-July 4. July 1-July 3 you can use fireworks in city limits between noon and 10:00 p.m. July 4 from noon-midnight.
From Sec 38-122 of the City of Siloam Springs Municipal Code:
On the dates of July 1 through July 3 of each year, between the hours of 12:00 p.m. and 10:00 p.m., on the date of July 4 of each year, between the hours of 12:00 p.m. and 12:00 a.m., and on the dates of December 31 at 12:00 p.m. through January 1 at 1:00 a.m., the use of fireworks shall be permitted, with the exception of any aerial fireworks device attached to a stick commonly referred to as a "bottle rocket," or any other similar device, regardless of its name.
With the exception of fireworks used or exploded by the city for purposes of a public display, no fireworks shall be used or discharged on any city-owned property.
Section of Municipal Code Related to Fireworks