וַיִּוָּעַ֨ץ הַמֶּ֧לֶךְ וְשָׂרָ֛יו וְכָל־הַקָּהָ֖ל בִּירוּשָׁלִָ֑ם לַעֲשׂ֥וֹת הַפֶּ֖סַח בַּחֹ֥דֶשׁ הַשֵּׁנִֽי׃
For the king had taken counsel, and his princes, and all the congregation in Jerusalem, to keep the passover in the second month.
Mishnah Pesachim
Six things King Hezekiah did, concerning three they [the sages] agreed with him, and concerning three they did not agree with him: He dragged his father's bones [corpse] on a rope bier, and they agreed with him; He crushed the bronze serpent, and they agreed with him; He hid the book of remedies, and they agreed with him. And concerning three they did not agree with him: He cut down the doors of the Temple and sent them to the king of Assyria, and they did not agree with him; He closed up the waters of the Upper Gihon, and they did not agree with him; He intercalated [the month of] Nisan in Nisan, and they did not agree with him.