What Happen on this Month of Adar Bet in the Bible?
Adar 11 – Ta’anit Ester; the Fast of Esther

Adar 13 – On this day Haman’s plan to annihilate the Jewish people was to be implemented (Esther 3:13). The Jews were given the right to defend themselves (Esther 8:12). Eve Purim – Eve of the Feast of Lots

Adar 14 – On this day the Jews celebrated their victory over Haman and all who followed his evil plan (Esther 9:17)