How old is Ramayana?

I'm curious, could you tell me how old the epic poem Ramayana is? I understand it's a foundational text in Hinduism and has been passed down through generations, but I'm unsure of its exact historical origins and timeline. Does the text have a definitive date of composition, or is it a collection of stories that evolved over time? I'm fascinated by the cultural and historical significance of this ancient work and would love to learn more about its age and origins.