Chassidim worldwide mark the yahrtzeit-hilula of Harav Levi Yitzchak Schneerson, the Rebbe's father, on the eve of Chof Av. Harav Levi Yitzchak was a scholar and kabbalist who endured years of exile for maintaining his commitment to Torah and Jewish practice, continuing to teach until his death on Chof Av 5704.
For the Rebbe, the day held significance beyond remembrance. Each year, the Rebbe encouraged Chassidim to study his father's Torah and support institutions established in his name.
In a letter before Chof Av, the Rebbe wrote: "כ״ף מנחם אב, יום היארצייט וההילולא של אאמו״ר לוי יצחק ז״ל... ועלי החוב והזכות גדול להציע ולבקש, שכל אחד ואחד ילמוד בהתוועדות מתורתו, ולנדב ביומא דין לזכות נשמתו." He also stated: "Chof Menachem Av, the yahrtzeit-hilula of my revered father, Harav Levi Yitzchak... I feel it my great obligation and privilege to suggest and request that every person study from his Torah at the farbrengen and give tzedakah on this day for the merit of his soul."
The Rebbe devoted sustained effort to preserving and disseminating his father's legacy, encouraging publication of his Torah and supporting memorial initiatives.
Bais Levi Yitzchak of Pomona was established in this spirit. The synagogue maintains regular classes in Harav Levi Yitzchak's Torah alongside its broader schedule of Torah and Chassidus study. Contributions to the institution represent participation in one of the Rebbe's personal directives.