Middle-earth in The Lord of the Rings is an ancient place that Tolkien imbued with a full and rich history. The Fellowship embarked on their quest to destroy the One Ring in the 3018th year of the Third Age. There were two full ages before that, meaning the events of the main series take place over 7000 years after Vala Aulë created that sun that rises over Middle-earth.
Source：https://www.cbr.com/oldest-items-lord-of-the-rings/
