Please note that Mommsen uses the AUC chronology (Ab Urbe Condita), i.e. from the founding of the City of Rome. You can use this reference table to have the B.C. dates
From: The History of Rome, by Theodor Mommsen
Translated with the sanction of the author by William Purdie Dickson
To these festivals were added at the close of the year the wolf-festival (-Lupercalia-, February 17) of the shepherds in honour of the good god, Faunus, and the boundary-stone festival (-Terminalia-, February 23) of the husbandmen, as also the summer grove-festival of two days (-Lucaria-, July 19, 21) which may have had reference to the forest-gods (-Silvani-), the fountain-festival (-Fontinalia-, October 13), and the festival of the shortest day, which brings in the new sun (-An-geronalia-, -Divalia-, December 21).
Of not less importance--as was to be expected in the case of the port of Latium--were the mariner-festivals of the divinities of the sea (-Neptunalia-, July 23), of the harbour (-Portunalia-, August 17), and of the Tiber stream (-Volturnalia-, August 27).
Handicraft and art, on the other hand, are represented in this cycle of the gods only by the god of fire and of smith's work, Vulcanus, to whom besides the day named after him (-Volcanalia-, August 23) the second festival of the consecration of trumpets was dedicated (-tubilustrium-, May 23), and eventually also by the festival of Carmentis (-Carmentalia- January 11, 15), who probably was adored originally as the goddess of spells and of song and only inferentially as protectress of births.
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Reference address : http://www.ellopos.net/elpenor/rome/1-12-religion.asp?pg=4