Tretā-yuga—the second in the cycle of the four ages of the universe or mahā-yuga. It lasts 1,296,000 years. In this age Lord Rāmacandra appeared.

Treta-yuga-the second in the cycle of the four ages of the universe or maha-yuga. It lasts 1,296,000 years. In this age Lord Ramacandra appeared.
 

Link to this page: https://prabhupadabooks.com/glossary/t/treta-yuga-the-second-in-the-cycle-of-the-four-ages-of-the-u