“Son of man, write down today’s date, for on this very day the king of Babylon has laid siege to Jerusalem.
We have here, I. The notice God gives to Ezekiel in Babylon of Nebuchadnezzar's laying siege to Jerusalem, just at the time when he was doing it (Eze 24:2): "Son of man, take notice, the king of Babylon, who is now abroad with his army, thou knowest not where, set himself against Jerusalem this same day." It was many miles, it was many days' journey, from Jerusalem to Babylon.
Commenting on Ezekiel 24:1-14
Son of man, write thee the name of the day,.... That is, what day of the week it was, as well as what day of the month; as whether the first, or second, or third, &c.: for the Jews had no other names for their days, as we have: even of this same day; according to Bishop Usher (r), it was the 30th of January...
Eze 24:1-2 On the day on which the king of Babylon commenced the siege and blockade of Jerusalem, this event was revealed by God to Ezekiel on the Chaboras (Eze 24:1 and Eze 24:2); and he was commanded to predict to the people through the medium of a parable the fate of the city and its inhabitants (Eze 24:3-14).
Commenting on Ezekiel 24:1-2