Starting with Lag B'Omer we no longer behave like mourners, and starting with Yom Yerushalayim, we barely say Tachanun. Yom Yerushalayim is the first day of the last week of the Omer period. This week is the seventh week, the holy week, corresponding to the eigth king, who does not die. This is the week that corresponds to the history of man. Yetziat Mitzrayim corresponds to day 45 of the Omer, the third day of the seventh week. Starting from this day, Tachanun is canceled altogether.
I have presented the age of the world as 46000 times 300000 years, 13.8 billion years. That number is a fraction of a percent too high. Now, 46 is a little over two percent more than 45, מ"ה, a divine number, and 300000 is a little under two percent less than the 304805 letters of the Torah.
HaKadosh Baruch Hu (מ"ה) looked in the Torah and created the world - קודשא בריך הוא אסתכל באורייתא וברא עלמא. Perhaps one can say that He counted the letters. The multiplication 45000*304805 yields 13716225000, a value that is pretty close to the current scientific value of the age of the Universe.
The 13716225000 years would be the time until "Yom Yerushalayim," until the last week of the Omer, until the emergence of man. Add 73440 years until Yetziat Mitzrayim, and 4442 years from Yetziat Mitrayim until now, in the chronology that I have described, and obtain that we live 13716302882 years after Creation...
