a unit of the geologic time scale, less than a period and greater than an age

a step in the training process of an artificial neural network.

Unix epoch

a phase in the development of the universe with distinctive properties

the main article epoch (reference date).

Epoch Co., Ltd., the maker of the above and other computer games

Epoch (DC Comics), a supervillain also known as the Lord of Time

Epoch (film), a science fiction film directed by Matt Codd

The Epoch Game Pocket Computer, an early hand-held game console

a distinctive historical period or era

An Epoch signifies a significant event, time, or moment which is chosen as a new origin for time measurements, usually as the delimiting factor of an era:

References to such may include Epochal date, Epochal event, Epochal moment as covered in

epoch (astronomy), and Epochal moment regard a precise moment in time for which celestial coordinates or orbital elements are specified.

The Epoch Times, a privately owned Falun Gong-linked newspaper

Epoch Javascript Calendar is an open source, GPL calendar component for use in web pages written in JavaScript