(Taken From Sefer HaMinhagim (English translation) p. 173)

1. One should endeavor to arrange that a bar-mitzvah should be called to the Reading of the Torah for his first aliyah on a Monday or Thursday morning, or at Minchah on Shabbos.[1]

2. The blessing (Siddur, p. 70) is said without mentioning G-d's Name. It can be said [at the Reading of the Torah] on a Monday, Thursday, or Rosh Chodesh, and not necessarily on Shabbos.[2]

3. According to the custom of Lubavitch, people get together after Shacharis, the relatives of the bar-mitzvah say a few words in honor of the happy occasion, and the bar-mitzvah repeats a maamar of Chassidus.[3] Those present are then offered cake and mashke, and a festive meal is held in the evening.[4]

   

Notes:

1. (Back to text) A directive of the Alter Rebbe; see Likkutei Dibburim, Vol. II, p. 533 [and in English translation: Vol. II, ch. 14, sec. 57], at length.

2. (Back to text) HaYom Yom, p. 112. See Rama, [Orach Chayim,] sec. 225; Shaar HaKollel, sec. 24.

3. (Back to text) It has become the custom of late for the bar-mitzvah to recite the maamar beginning with the words, Issa BeMidrash T[eh]illim, which was delivered [first by the Rebbe Rashab at his own bar-mitzvah in the year 5634 (; 873), and then repeated (with additions) by the Previous Rebbe at his own bar-mitzvah] in 5653 (; 1893). The maamar is reprinted in Sefer HaMaamarim 5708.

4. (Back to text) Likkutei Dibburim, op. cit., sec. 58.

   Cf. the following passage in Zohar Chadash, Parshas Bereishis: ''R. Shimon Bar Yochai invited the leading scholars of the Mishnah to partake of a great festive meal which he had arranged.... He was very happy..., because, [as he explained,] 'On this day a holy and exalted soul descended...into my son R. Elazar, and on this joyous occasion I shall experience supreme joy.' ''

   See also Magen Avraham on Shulchan Aruch, Orach Chayim 225:4: ''One is obliged to prepare a festive meal on the day that his son becomes bar-mitzvah as on the day that he is escorted to the marriage canopy.''