Ages of Middle-earth

Warning: Wikipedia contains spoilers

(From J. R. R. Tolkien's fictional universe Middle-earth)

Ages of the World

• Before the Ainur were made. Duration: Infinite.
• Before Eä (the universe) was made. Duration: Not specified.
• Before Arda (the world) was made. Duration: Not specified.
• The earliest age of Arda, when the Valar shaped the world. Duration: Not specified.
• The Years of the Lamps. Duration: Not specified.
• The Years of the Trees
  • The first Age of the Two Trees, and the beginning of the count of Time. Duration: Not specified.
  • (Possibly a separate age here, when the Elves awoke.)
  • The first age of the captivity of Melkor. Duration: Not specified.
  • The second age of the captivity of Melkor. Duration: Not specified.
  • The third age of the captivity of Melkor. Duration: Not specified.
  • The age in which Melkor lived in Valinor.
• The Years of the Sun
  • The First Age. Duration: 583 years.
  • The Second Age. Duration: 3441 years.
  • The Third Age. Duration: 3021 years.
  • The Fourth Age. Duration: Not specified.
  • Later Ages up to the present day