Ante diem III Idus Iunonias (11 June) Nefas

Matralia

In 396 BCE Camillius Furius vowed to rebuild and dedicate a temple to Mater Matuta, which previously had been dedicated by Servius Tullius in the Forum Boarium (Livy 5.19; 5.23). On the Matronalia mothers would gather in this temple to offer prayers first on behalf of their nephews and nieces, and secondly for their own children. A woman selected before hand, who had to be the wife of a first marriage, dressed the statue of Mater Matuta (Tertullian De Monogram. 17). No female slaves were allowed to enter except one, who was ceremoniously expelled with a box to the ears (Ovid Fasti 6.481; Plutarch Q. R. 16; Camillus 5). Special cakes, liba tosta, were offered to Mater Matuta that had been cooked in earthenware pans (Varro L. L. 5.106; Ovid Fasti 6.481, 532).

Dies natalis of the Temple of Fortuna Virgo in the Forum Boarium, said to have been first dedicated by Servius Tullius. The temple contained an ancient wooden statue of Fortuna that was heavily veiled (Pliny N. H. 8.194, 197). She also wore the toga praetextae of Servius Tullius, which was said to have lasted until the death of Sejanus. Just before his fall, the statue of Fortuna turned her face away from Sejanus (Dio Cassius 58.7). Ovid instead said that the veiled statue was that of Servius Tullius, his toga pulled over his face, and that Fortuna spoke, "The day on which the face of Servius is uncovered will be the first day modesty is lost." Servius Tullius was closely linked with Fortuna, who would appear to him at his window by night. Ovid also had it that Servius Tullius, or his statue, had said, "Cover my face lest it see the unspeakable features of my daughter." The "Good Fortune of Virgins" at any rate oversaw the modesty of unmarried girls who were under the protection of their fathers.

On this day, too, is celebrated the dedication of the Altar of Concordia, provided by Livia in 2 BCE, following the exile of Julia.

Ludi Saeculares

On the final of seven days of plays, performed in Latin and Greek, by which the Ludi Saeculares had been extended...
Lines 162-3: Three days before the Ides of June (11 June), an edict was issued in the following words: "The quindecimviri sacris faciundis decree: On the day before the Ides of June (12 June) we shall present a hunting display [in...and we shall commence circus games.]"