halcyon

Marked by peace and prosperity.

“the halcyon days of the clipper trade”

Idyllically calm and peaceful; suggesting happy tranquillity.

“a halcyon atmosphere”

A large kingfisher widely distributed in warmer parts of the Old World.

(Greek mythology) a woman who was turned into a kingfisher.

A mythical bird said to breed at the time of the winter solstice in a nest floating on the sea and to have the power of calming the winds and waves.