When did the solar system experience the period of heaviest planetary impacts?

The solar system experienced the period of heaviest planetary impacts during the Late Heavy Bombardment, which occurred approximately 4.1 to 3.8 billion years ago. This era was characterized by a significant increase in asteroid and comet collisions with the inner planets, including Earth, the Moon, and Mars. The Late Heavy Bombardment is thought to have played a crucial role in shaping the geological and atmospheric conditions of these bodies.