Depending on context, epoch can refer to:
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
Moment in time
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
- the main article epoch (reference date).
- epoch (astronomy), and Epochal moment regard a precise moment in time for which celestial coordinates or orbital elements are specified.
Time benchmark in Computing
- a step in the training process of an artificial neural network.
- Unix epoch
Proper noun
- Epoch (film), a science fiction film directed by Matt Codd
- The sequel Epoch: Evolution
- The Epoch Game Pocket Computer, an early hand-held game console
- Epoch Co., Ltd., the maker of the above and other computer games
- Epoch (Chrono Trigger), a flying time machine in role-playing game Chrono Trigger
- Epoch (DC Comics), a supervillan also known as the Lord of Time
- 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