What is halcyon? How to use in English

The word "halcyon" comes from the Greek mythological figure Alcyone, who was the wife of Ceyx, a king. In the myth, Alcyone was turned into a bird, known as the halcyon, by the god Zeus, as a result of her profound grief for her husband's death. The bird was said to build its nest on a rock in the sea during the winter solstice, when the sea was calm and the winds were still. This became known as the "halcyon days," a term used today to refer to a period of calm and peace in the midst of stormy circumstances. The word "halcyon" itself is derived from the Greek "halcyon," which means "kingfisher," as the bird in the myth was believed to be a kingfisher. Overall, the word "halcyon" has its roots in Greek mythology, where it first appeared to describe a mythological bird with the ability to bring about calm and stillness in nature during the winter solstice. This ancient term has continued to be used today, carrying its rich mythological heritage, to describe periods of calm and peace despite the presence of turbulent circumstances.