This is the first month of the Hebrew calendar. It is during the last part of March and the first part April on Western calendars. (See: [[rc://en/ta/man/jit/translate-hebrewmonths]] and [[rc://en/ta/man/jit/translate-ordinal]])
Since Hezekiah was king, he may have had his workers do these things. Alternate translation: "Hezekiah ordered his workers to open the doors ... and to repair them" (See: [[rc://en/ta/man/jit/figs-metonymy]])