Epoch

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