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
At the same time its ancient simplicity also departed. Theology, the spurious offspring of reason and faith, was already occupied in introducing its own tedious prolixity and solemn inanity into the old homely national faith, and thereby expelling the true spirit of that faith. The catalogue of the duties and privileges of the priest of Jupiter, for instance, might well have a place in the Talmud.
They pushed the natural rule--that no religious service can be acceptable to the gods unless it is free from flaw--to such an extent in practice, that a single sacrifice had to be repeated thirty times in succession on account of mistakes again and again committed, and that the games, which also formed a part of divine service, were regarded as undone if the presiding magistrate had committed any slip in word or deed or if the music even had paused at a wrong time, and so had to be begun afresh, frequently for several, even as many as seven, times in succession.
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Reference address : https://www.ellopos.net/elpenor/rome/3-13-faith-manners.asp?pg=14