'the third of Tammuz') is a holiday on the Chabad-Lubavich calendar that marks the anniversary of the death of Rabbi Menachem Mendel Schneerson, the seventh Rebbe of the Chabad-Lubavitch Hasidic dynasty.

[4] His ability to communicate remained, as he often sent written letters and recorded messages for special occasions, maintaining a connection with his community.

Many of his followers continued to express their belief in his leadership and teachings, reflecting their ongoing dedication to his vision for the Jewish community.

It is customary for members of the movement to write a "pan" (a letter addressed to the Lubavicher Rebbe's gravesite)[8] with the belief that he remains spiritually alive and may respond to their requestsr.

However, this date is not widely recognized as his full liberation, since he was only sent into exile in Kostroma at that time, and it wasn’t until 12–13 Tammuz that he received permission to return home.