halcyon days plural noun
A time of peace and happiness
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Main Entry: ↑halcyon
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a period of time in the past that was happy and peaceful
Thesaurus: pleasant situationssynonym
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halcyon days,
1. fourteen days of calm weather, anciently believed to occur about the winter solstice when the halcyon or kingfisher was nesting: »
Expect St. Martin's summer, halcyon days (Shakespeare).
2. Figurative. days of tranquility or peace; quiet, happy period.
Useful english dictionary. 2012.