An epoch is an instant in time chosen as the origin of a particular calendar era.

Epoch or EPOCH may also refer to:

  • Epoch (astronomy), a moment in time used as a reference for the orbital elements of a celestial body
  • Epoch (computing), a moment from which system time is usually measured
  • Epoch (cosmology) or cosmologic epoch, a phase in the development of the universe since the Big Bang
  • Epoch (geology), a span of time on the geologic time scale shorter than a period and longer than an age
  • Epoch (race), racial periods in Blavatsky's esoteric theory of the root races
  • Unix epoch, the starting time for Unix-based operating systems

Arts and entertainment

  • Epoch (DC Comics), a supervillain also known as the Lord of Time
  • Epoch (Marvel Comics), a cosmic entity in the Marvel Comics universe
  • Epoch (film), a 2001 American science fiction film
  • Epoch (anthology), a 1975 anthology of science fiction stories
  • Epoch (video game), a 1981 space combat game for the Apple II
  • Epoch (The Brave album), 2016
  • Epoch (Tycho album), 2016
  • Epoch, a 2006 album by Rip Slyme

Games

  • Epoch Co., a Japanese toy and computer games company
  • Epoch Game Pocket Computer, an early hand-held game console produced by Epoch Co.
  • Epoch (Chrono Trigger), a flying time machine in role-playing game Chrono Trigger
  • Epoch Hunter, a boss in Caverns of Time from the game World of Warcraft

Publications

  • Epoch (American magazine), literary magazine of Cornell University
  • Epoch (Russian magazine), literary magazine by Fyodor Dostoyevsky and his brother Mikhail
  • Ha-Tsfira (lit. Epoch), a Hebrew language newspaper published in 1862 and 1874–1931
  • The Epoch Times, a privately owned Falun Gong-linked newspaper

Science and technology

  • EPOCH (chemotherapy), a chemotherapy regimen
  • EPOCh (Extrasolar Planet Observation and Characterization), a NASA mission associated with EPOXI
  • Epoch (machine learning), the training of a model for one cycle through the whole training dataset

Weapons

  • Epoch Remote Control Turret

See also

  • Aeon or Eon
  • Age (geology)
  • Epoché (term in Greek philosophy, meaning 'suspension of judgement' or 'withholding of assent')
  • Belle Époque (disambiguation)
  • Epic (disambiguation)
  • Era (span of time with different definitions according to context)
  • Periodization