This is the seventh month of the Hebrew calendar. The twenty-third day is near the middle of October on Western calendars. (See: [[rc://en/ta/man/translate/translate-hebrewmonths]] and [[rc://en/ta/man/translate/translate-ordinal]])
The words "glad" and "joyful" mean basically the same thing. Together they emphasize the intensity of joy. Alternate translation: "with very glad hearts" or "and they were very joyful" (See: [[rc://en/ta/man/translate/figs-doublet]])