Ladys-Smock

I have been hearing Cuckoos calling for the last couple of weeks but as yet have not seen one. This flower has a variety of names....Ladys Smock....Milkmaids and Cuckoo Flower as it flowers about the same time Cuckoos start to call. In folklore it is said to be sacred to the fairies and is unlucky to be brought indoors. If you know anything about the other two names please let me know.