epoch - A period of time, A moment in time, As a proper noun

In geology, an arbitrary unit of time used as a subdivision of a period.

Depending on context, epoch can refer to:

A period of time

a distinctive historical period or era a unit of the geologic time scale, less than a period and greater than an age a phase in the development of the universe with distinctive properties

A moment in time

an instant of origin chosen as the epoch (reference date) from which time is measured in a calendar era or in a computer system. a step in the training process of an artificial neural network

As a proper noun

The Epoch Game Pocket Computer, an early handheld game console Epoch (Chrono Trigger), a flying time machine in role-playing game Chrono Trigger Epoch (DC Comics), a supervillain also known as the Lord of Time The Epoch Times, a Falun Gong-linked Chinese newspaper The epoch in Unix timekeeping, 00:00:00 UTC on January 1, 1970. Epoch Javascript Calendar is an open source, GPL calendar component for use in web pages written in JavaScript EPOCH IPS, an integrated software suite that are used for satellite command and control

This disambiguation page lists articles associated with the same title.