(a) Yud Shvat:
The tenth of Shvat is the day on which our saintly master and teacher – R. Yosef Yitzchak, the sixth of the Rebbeim of Chabad – departed this world. Born on Yud-Beis Tammuz 5640 (1880), the Rebbe Rayatz succeeded to the leadership in the year 5680 (1920) and passed away at 8.45 a.m. on Shabbos Parshas Bo, on the tenth day of the eleventh month, Shvat. His resting place is in New York.[670]
(b) Letter of the Rebbe Shlita regarding the Yahrzeit:
By the Grace of G-d
Rosh Chodesh Shvat, 5711
Brooklyn, N.Y.
To Anash, to the students of Tomchei Temimim, and to those who have a bond or a relationship with my revered father-in-law the saintly Rebbe, of blessed memory:
G-d bless you all.