Adar (Alef) 1 – On this day Ezekiel prophesied against Pharaoh - Ezekiel 32:1
Adar (Alef)3 – On this day the second Temple was completed – Ezra 6:15
Adar (Alef)7 - Moses was born in Egypt of the Hebrew year 2368 (1393 BCE) and is said to have died on his 120th birthday, Adar 7, 2488 (1273 BCE)
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)
Adar (Alef) 14 - (1393 BCE) - Moses' brit milah was the 8th day of his life and the day on which he was circumcised in accordance with the divine command to Abraham.
Adar (Alef) 15 – On this day Ezekiel prophesied against the nations (Ezekiel 32:17)
Adar (Alef) 23 - (1312 BCE) - Mishkan assembled for the 1st time; "Seven Days of Training" begin. During the week of Adar 23-29, the Mishkan was erected each morning and dismantled each evening; Moses served as the High Priest and initiated Aaron and his four sons into the priesthood. Then, on the "eighth day," the 1st of Nissan, the Mishkan was "permanently" assembled (that is, put up to stand until the God-given command would come to journey on), Aaron and his sons assumed the priesthood, and the divine presence came to dwell in the Mishkan.
Adar (Alef) 25 – On this day King Jerhoiachin was freed from prison
Adar (Alef) 27 – On this day King Jerhoiachin was released (2 Kings 25:27)
Leap Year designation:
In leap years, it is preceded by a 30-day intercalary month named Adar Aleph (Aleph being the first letter of the Hebrew alphabet), Adar Rishon (First Adar) or Adar I and it is then itself called Adar Bet (Bet being the second letter of the Hebrew Alphabet), Adar Sheni (Second Adar) or Adar II. Occasionally instead of Adar I and Adar II, "Adar" and "Ve'Adar" are used (Ve means 'and' thus: And Adar). Based on a line in the Mishnah declaring that Purim must be celebrated in Adar II in a leap year (Megillah 1:4), Adar I is considered the "extra" month.