What was the significance of the solstice deadline lighting thief?

The "Solstice Deadline" in the context of the "Lighting Thief" refers to the impending deadline for the protagonist, Percy Jackson, to return Zeus's stolen lightning bolt before the summer solstice. This deadline serves as a crucial plot device, intensifying the urgency of Percy's quest and highlighting the consequences of failing to restore balance among the gods. It emphasizes themes of responsibility, bravery, and the importance of friendship as Percy navigates challenges to fulfill his mission. Ultimately, the deadline pushes the narrative forward, creating tension and driving character development.