In the fiction of
J. R. R. Tolkien, the
Years of the Sun are the last of the three great time-periods of Middle-earth, together with the
Years of the Lamps and the
Years of the Trees. They begin with the
Return of the Noldor to
Middle-earth, and last until the present day. (The history of the fictional Middle-earth is to be taken fictionally as a history of the real Earth.) The They are divided into several Ages; Tolkien only describes the
First,
Second, and
Third Ages, and part of the
Fourth, but he does say that we are living in the sixth or seventh.