Here's why:
* Yugantham literally means "end of an era" or "end of a yuga" (yuga being a vast period of time in Hindu cosmology).
* Apocalypse also refers to a catastrophic event that signifies the end of the world or a major era.
While not a perfect translation, Apocalypse captures the essence of "Yugantham" in its connotations of destruction, upheaval, and the end of a significant era.