A numerical model developed during an extensive investigation of the geological and geotechnical conditions of the Gediminas Hill in 2020 year is used to evaluate the dynamic load for the slopes. Fireworks shooting from a Gediminas Hill causes a dynamic load. In recent years, shallow landslides have occurred on the slopes of Gediminas Hill. According to the recommendation of fireworks specialists, a firework shot corresponds to hitting a 100 kg object from a height of 1 m. Depending on the deformation of the base on which the object hits, the impact force can reach up to 1000 kN. The numerical model evaluates 14 possible firing positions of fireworks located in the inner square of the mountain. Six firing positions are located near the northern slope and eight firing positions are located near the southern slope. The eastern and western slopes are covered with buildings, so shooting positions were not considered in these areas. The model estimated that the firing is executed synchronously from all positions. Dynamic calculations have shown that potentially dangerous landslide zones are forming on the Gediminas Hill surface. The landslide sliding surfaces formed within ten seconds of the shooting.