Mesa reminds residents to buy and use fireworks during the permissible period to avoid civil or criminal penalties. Legal fireworks are available for sale in Mesa through Jan. 3 and can be used in the City from Dec. 26 until Jan. 4 between 8 a.m. and 11 p.m. and from 11 p.m. on Dec. 31 to 1 a.m. on Jan. 1.