Josiah celebrated Passover unto Adonai in Jerusalem. They slaughtered the Passover lamb on the fourteenth day of the first month.
You must watch over it until the fourteenth day of the same month. Then the whole assembly of the congregation of Israel is to slaughter it at twilight.
You are to celebrate it at its appointed time, at twilight on the fourteenth day of this month, with all its rules and regulations.”
The exiles celebrated the Passover on the fourteenth day of the first month,
“In the first month, on the fourteenth day of the month, you will have the Passover, a feast of seven days when matzah will be eaten.
Now sanctify yourselves, slaughter the Passover lamb and prepare it for your kinsmen, according to the word of Adonai by the hand of Moses.”
They slaughtered the Passover lambs and while the kohanim sprinkled the blood handed to them, the Levites flayed them.