Torah reading as we know it today is a rabbinic innovation, beginning with Moshe Rabbeinu who--in his rabbinic role (as opposed to his role as transmitter of the Divine Torah)--ordained that we must read the Torah on Shabbat, Mondays, and Thursdays. Ezra--who, the Talmud declares, was worthy to have the Torah given through him, but Moshe beat him to it (Sanhedrin 21b)--added the requirement to read it on Shabbat afternoons, and added the system of aliyot we have today (Bava Kama 82a).
“And Moshe was one hundred and twenty years when he died” (Devarim 34:7). It is a beautiful, if somewhat unrealistic, custom to offer blessings to those celebrating a birthday that they should live to be 120. While this quantity of life is (usually) unrealistic, the blessing to live to 120 relates not only to quantity, but to the quality of life; “his eyesight did not diminish and his strength did not wane” (ibid).
This week's devar Torah is dedicated in honour of the bat mitzvah of Temira Koenig. Mazal tov to her parents, Tali and Jason, and to the entire family. May Temira follow in the footsteps of Miriam, sanctifying the name of G-d in all that she does.