Variant of Alcyone, Halcyone.

• Halcyon was a bird, now believed to have been the kingfisher. It was supposed to have a calming influence on the sea at the time of winter solstice. Folklore held that during the halcyon days, from seven days before the solstice until seven days after it, storms would not occur at sea. By extension, halcyon has come to mean the best period of one's life or career, or a period of great happiness.
• Because it is associated with kingfishers, Halcyon is one of the genera of kingfishers.
• The Halcyon is the yearbook of Swarthmore College
• Halcyon is also an obscure video-game console.
• Halcyon is also an ancient work purportedly written by Plato.
• Halcyon, California
• The Pillar of Autumn, featured in the Xbox game Halo: Combat Evolved, is a Halcyon-class Cruiser.