Halcyon, a fictitious planet in several novels by Robert A. Heinlein

Halcyone (novel), a 1912 novel by Elinor Glyn

Halcyon days, an expression meaning "calm"

Halcyon is the main chatroom of the online client for Supreme Commander

The Halcyon, the yearbook of Swarthmore College

Halcion, an insomnia drug

"The Halcyon Days" a song by The Tea Party

Halcyon (console), a video-game console

"Halcyon (Beautiful Days)", a song by Mono (Japanese band)

Halcyon, California

Tree kingfisher, a family of birds (Halcyonidae) containing the above genus

Halcyon Monitoring Solutions, Inc., a company that monitors reports performance of computer systems

Halcyon is a term that originates from the Greek myth of Alcyone. It is used most often to mean golden or marked by peace and prosperity. For example, "a golden era" or "those halcyon days". Halcyon or Halcyone may also refer to: Birds

"Halcyon Days", a song by Model Engine

Halcyon (role-playing game), an indie role-playing game

Halcyon (genus), a type of bird

Halcyon (Orbital song), a song by Orbital

Halcyon (Chicane song), a song by Chicane

Halcyon (dialogue), an ancient work of literature

Halcyon, a class of starship from the game Halo Universe. The Pillar of Autumn was a Halcyon-class cruiser.

The Thran, novel in the Magic: the Gathering series by J. Robert King. Halcyon is the capital city of the Thran civilization.

Halcyon (Stargate Atlantis novel), by James Swallow

Halcyon Drift, the first book in Brian Stableford's science fiction Hooded Swan (series)

"Halcyon", an acoustic song by the heavy metal band The Acacia Strain off their second album 3750

Halcyon Days, a song by Bruce Hornsby

"Halcyon Days", a song by Siobhan Donaghy off her second album Ghosts.

Halcyon Days (album), an album and title track by Steve Roach, Stephen Kent (musician), and Kenneth Newby.

Halcyon 23, an English type of sailing ship that was built in the 1970's

Good Bye Halcyon Days, a chapter of the anime manga Bleach