John Gill Commentary Jeremiah 52:5

"So the city was besieged unto the eleventh year of king Zedekiah." — Jeremiah 52:5 (ASV)

So the city was besieged unto the eleventh year of King
Zedekiah .
] The siege continued about eighteen months; from the tenth day of the tenth month, in the ninth of Zedekiah's reign, to the ninth day of the fourth month, in the eleventh year of his reign; as follows: