Q: WHAT YEAR WAS THE JERUSALEM TEMPLE DESTROYED?
A: IT DEPENDS WHAT CALENDAR YOU ARE USING!
On the Gregorian calendar (the one you might have on your wall) the year was 523 BC.
On the Hebrew calendar, sometimes called the biblical calendar, the year was 3524 AM.
Learn more about it in the article The Destruction of Solomon's Temple (La Destrucción del Templo de Salomón—Fecha)
Jeremiah 52:6-7 – 6 By the fourth month, on the ninth day of the month, the famine had become so severe in the city that there was no food for the people of the land. 7 Then the city wall was broken through, and all the men of war fled and went out of the city at night by way of the gate between the two walls, which was by the king's garden, even though the Chaldeans were near the city all around. And they went by way of the plain.
Jeremiah 52:12-13 – 12 Now in the fifth month, on the tenth day of the month (which was the nineteenth year of King Nebuchadnezzar king of Babylon), Nebuzaradan, the captain of the guard, who served the king of Babylon, came to Jerusalem. 13 He burned the house of the Lord and the king's house; all the houses of Jerusalem, that is, all the houses of the great, he burned with fire.
Prophesy 6—Ezekiel 26:1
Prophesy 7—Ezekiel 29:1
Prophesy 8—Ezekiel 31:1
Prophesy 9—Ezekiel 32:1