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
It is not credible that Caesar shared the crude views of his party on the interest question; the fact, that, in his account of the matter of liquidation he mentions the enactment as to the surrender of the property of the debtor in lieu of payment but is silent as to the cancelling of the interest, is perhaps a tacit self-reproach. But he was, like every party-leader, dependent on his party and could not directly repudiate the traditional maxims of the democracy in the question of interest; the more especially when he had to decide this question, not as the all-powerful conqueror of Pharsalus, but even before his departure for Epirus.
But, while he permitted perhaps rather than originated this violation of legal order and of property, it is certainly his merit that that monstrous demand for the annulling of all claims arising from loans was rejected; and it may perhaps be looked on as a saving of his honour, that the debtors were far more indignant at the--according to their view extremely unsatisfactory--concession given to them than the injured creditors, and made under Caelius and Dolabella those foolish and (as already mentioned) speedily frustrated attempts to extort by riot and civil war what Caesar refused to them.
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Reference address : https://www.ellopos.net/elpenor/rome/5-11-old-republic-new-monarchy.asp?pg=127