La Ba’Omer is the best. I will explain this holiday to you. But it is a long story.
In the Beginning, God created the heaven and the earth.
Why he would do this is mysterious, and the matter cannot be easily adjudicated in a humble space like this. The best way to put it is that He desired to be in a new way. As He is unto Himself, but in Another place. He wished to demonstrate, to Himself, that He was as True in a false place or that all places were false in light of His truth or something. It took Him six days, and the sixth of these was Friday, and we call it the first of Tishrei, Rosh Hashana, head of the year. (We celebrate the sixth day because that is when man was created, and despite what anyone may tell you, the universe was created for him.)
However, some opinions say that man was, or could have been, or will be created on the First of Nissan — a spring month, halfway across the year from Tishrei, a time of rebirth and sprouting rather than withering and in-gathering. That the world could have been created on either says something about the world.
In any case, these two months have since then ever competed for the main focus of Jewish life. The fall season also includes Yom Kippur,
The fall season also includes Yom Kippur, day of atonement, and Sukkot, the festival of ingathering and joy, and Simchat Torah, when the yearly Torah cycle ends and begins again, for all eternity. The fall season is one half of the dance between man and G-d. It is the part when man tallies his deeds, considers his distance from the Creator, and attempts to make amends. Our motion toward the creator takes the shape, like all things born, of a pregnancy. The relationship is established on Rosh Hashana, when we convince G-d the project of creation is worth continuing. The consummation is on Yom Kippur, when we are as angels in a moment of sublime unity with the creator. The child grows through its time in the Sukkot booth, the seed becoming differentiated and fully-formed, and its birth-culmination is on Simchat Torah.