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
The Latter Years of Philip
Philip displayed in the preparation and the concealment of his designs a calmness, earnestness, and persistency which, had he shown them in better times, would perhaps have given a different turn to the destinies of the world. In particular the submissiveness towards Rome, by which he purchased the time indispensable for his objects, formed a severe trial for the fierce and haughty man; nevertheless he courageously endured it, although his subjects and the innocent occasions of the quarrel, such as the unfortunate Maronea, paid severely for the suppression of his resentment.
It seemed as if war could not but break out as early as 571; but by Philip's instructions, his younger son, Demetrius, effected a reconciliation between his father and Rome, where he had lived some years as a hostage and was a great favourite. The senate, and particularly Flamininus who managed Greek affairs, sought to form in Macedonia a Roman party that would be able to paralyze the exertions of Philip, which of course were not unknown to the Romans; and had selected as its head, and perhaps as the future king of Macedonia, the younger prince who was passionately attached to Rome.
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Reference address : https://www.ellopos.net/elpenor/rome/3-10-third-macedonian-war.asp?pg=4