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

Epoch or EPOCH may also refer to:

Time-related 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