Halcyon or halcyon days.
The mythical bird, the halcyon, is identified with the kingfisher. Ceyx and Alcyone were lovers. Ceyx, the king of Trachis, was drowned at sea. Hera sent word to Alcyone in her sleep through Morpheus, the god of dreams, that her husband was dead. Alcyone in her grief was transformed into the kingfisher; as she tried to drag the lifeless body of Ceyx to shore, he too was changed into a bird. The lovers still traverse the waves, and in winter she broods her young in a nest which floats upon the surface of the water. During this time, Alcyone's father, Aeolus, king of the winds, keeps them from disturbing the serene and tranquil sea. Today, the halcyon days are a period of calm weather during the winter solstice, especially the seven days preceding and following it. Halcyon days can also describe any time of tranquillity.