I was reading today in Esther. It was really amazing to see how God timed the edict to destroy, to kill, to annihilate the Jews. The edict was written on the 13 day of Nisan (the first month). It would have started to be sent out on the 14 which was the Jewish day of Passover. It would have been a reminder to the Jews of God's great ability to deliver. It would give them hope that God could have a huge deliverance planned . The edict was not to be carried out until the 12 month so the Jews would have time to pray, etc.
I love how God ordered the timing of this.