Leo
The 5th month called Av on the Hebrew calendar, God's calendar stands for 
Simeon who was the 2nd son of Jacob born by Leah, (Genesis 29:33).
According to the Hebrew alphabet letter Simeon represents the Hebrew letter called Hei, which means; Revelation, take seed, be broken, also this alphabet letter is equivalent to the number 5.
According to the Jewish (Hebrew) studies of kabbalah the zodiac sign of Simeon is Leo (aryeh).
In Deuteronomy 33 Moses blesses Israel, but Simeon was the only tribe he did not prononce a blessing over.
It could be because of
Moses frustration with the tribe of Simeon over their involvement in the sin of baal Pe'or, when Baalam gave evil councel to Baalam to send midianite women into the camp of the children of Israel.
It was Shimon (Simeon's) idolatry Numbers 23:14 with foreign women and prostitution which resulted in his great evil (when the plague was released in Numbers 25:1-18). If you divide Shimon name (sham and avon) into two words, it spells "there is iniquity, i.e. sin"
Jacob speks over the tribe of Simeon in Genesis 33:5-7 "Simeon and Levi are brothers- their swords are weapons of violence.
Let me not enter their council, let me not join their assembly, for they have killed men in their anger and hamstrung oxen as they pleased.
Cursed be their anger, so fierce, and their fury, so cruel! I will scatter them in Jacob and disperse them in Israel.
Leo, the Lion, is the zodiac sign for Av.
The lion hovers as a symbol over Av, the most mournful month on the Hebrew calendar,
the month in which the Jewish people twice suffered the destruction of their temple and were twice exiled from their land.
Its zodiac sign is the lion, Leo, which the midrash sees as appropriate in many ways:
Israel suffered punishments because it did not heed the words of God, of whom it is said,
"A lion has roared, Who can but fear?" (Amos 3:8).
The prophet Jeremiah described Nebuchadnezzar, the Babylonian destroyer of the First Temple has a lion in the verse "The lion has come up from his thicket: The destroyer of nations has set out" (Jeremiah 4:7).
And the Temple itself, like Jerusalem, is called Aries, the lion of God, as in "Ah, Ariel, Ariel" (Isaiah 29:1).
This month falls in of July or August
