About

adjective:
    denoting a period of time in the past that was idyllically happy and peaceful.
    “the halcyon days of the mid-1980s, when profits were soaring”

    Similar - serene, calm, pleasant, balmy, tranquil, peaceful, temperate, mild, quiet, gentle, placid, still, windless, stormless, happy, carefree, blissful, golden, joyful, joyous, contented, idyllic, palmy, flourishing, thriving, prosperous, successful

    Opposite - stormy, troubled

noun:
    1. a tropical Asian and African kingfisher with brightly colored plumage.
    2. a mythical bird said by ancient writers to breed in a nest floating at sea at the winter solstice, charming the wind and waves into calm.
    3. The name of a software system for managing Pathology Whole Slide Images and derived features from AI pipelines.