This is the name given to two festivals held in ancient Boeotia, which was a part of Greece, in honor of the reconciliation of Hera and Zeus. The dates of these festivals are somewhat nebulous and varied from place to place and year to year. One source cites March 10th.
According to the myth, Hera and Zeus quarreled and Hera went away to Euboea and refused to return to his bed. To trick her into coming back and on the advice of Cithaeron, Zeus dressed up a carved oak-trunk to resemble a bride and let it be known that he planned to marry Plataea, the daughter of Asopus. Hera was so angry she tore the clothes from the statue, discovered the deception, and was so pleased that the two were reconciled.
The Lesser Daedala (Δαίδαλα μικρά) was held every four to six years. The people of Plataea went to an ancient oak grove and exposed pieces of cooked meat to ravens, attentively watching upon which tree any of the birds, after taking a piece of meat, would settle. Out of this tree they carved an image, and having it dressed as a bride, they set it on a bullock cart with a bridesmaid beside it. The image seems then to have been drawn to the bank of the river Asopus and back to the town, attended by a cheering crowd.
After fourteen of these cycles (approx.59 or 60 years), the Greater Daedala (Δαίδαλα μεγάλα) was held, and all Boeotia joined in the celebration. At its start one wooden figure was chosen from the many that had accumulated through the years and designated the “bride”. The wooden figure was prepared as a bride for a wedding, ritually bathed in the Asopus, adorned and raised on a wagon with an attendant. This wagon led a procession of wains carrying the accumulated daedala (all the other images that had been created over the years) up to the summit of Mount Kithairon, where a wooden sacrificial altar was erected out of square pieces of wood.
This was covered with a quantity of dry wood, and the towns, persons of rank, and other wealthy individuals, offered each a heifer to Hera and a bull to Zeus with plenty of wine and incense, while at the same time all of the daedala were placed upon the altar. For those who did not possess sufficient means, it was customary to offer small sheep, but all these offerings were immolated in a hecatomb in the same manner as those of the wealthier persons. The fire consumed both offerings and altar
An ancient account of myth behind the festival is related by Pausanias:
“Hera, they say, was for some reason or other angry with Zeus, and had retreated to Euboia. Zeus, failing to make her change her mind, visited Kithairon, at that time despot in Plataea, who surpassed all men for his cleverness. So he ordered Zeus to make an image of wood, and to carry it, wrapped up, in a bullock wagon, and to say that he was celebrating his marriage with Plataia, the daughter of Asopus. So Zeus followed the advice of Kithairon.
Hera heard the news at once, and at once appeared on the scene. But when she came near the wagon and tore away the dress from the image, she was pleased at the deceit, on finding it a wooden image and not a bride, and was reconciled to Zeus. To commemorate this reconciliation they celebrate a festival called Daidala, because the men of old time gave the name of daidala to wooden images… the Plataeans hold the festival of the Daidala every six years, according to the local guide, but really at a shorter interval.
I wanted very much to calculate exactly the interval between one Daedala and the next, but I was unable to do so. In this way they celebrate the feast.”
Found at Wikipedia