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
Distribution of Land
In the agrarian question Caesar, who already in his first consulship had been in a position to regulate it,(72) more judicious than Tiberius Gracchus, did not seek to restore the farmer-system at any price, even at that of a revolution--concealed under juristic clauses--directed against property; by him on the contrary, as by every other genuine statesman, the security of that which is property or is at any rate regarded by the public as property was esteemed as the first and most inviolable of all political maxims, and it was only within the limits assigned by this maxim that he sought to accomplish the elevation of the Italian small holdings, which also appeared to him as a vital question for the nation.
72. Cf. V. VI. Caesar's Agrarian Law
Even as it was, there was much still left for him in this respect to do. Every private right, whether it was called property or entitled heritable possession, whether traceable to Gracchus or to Sulla, was unconditionally respected by him.
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Reference address : https://www.ellopos.net/elpenor/rome/5-11-old-republic-new-monarchy.asp?pg=132