New Defender's Study Bible Notes
3:13 twelfth month. Exactly eleven months earlier, on the day before the Passover, this command had been given (compare Exodus 12:6), thus giving the Jews adequate time to prepare their defense. The date for Haman’s intended genocide had been set by the casting of lots. God, however, determines how the lot will fall (Proverbs 16:33), and He ordained that the date would be almost a year away. This day was adopted later by the Jews as the date for their annual feast of Purim (meaning “lots). See Esther 9:26-32.
3:13 posts. These were “couriers.”