Tevet 5 is celebrated as a day of rejoicing in the Chabad-Lubavitch community. On this date in 1987, U.S. Federal Court issued a decision in favor of Agudas Chassidei Chabad ("Union of Chabad Chassidim") regarding the ownership of the priceless library of the 6th Rebbe of Chabad-Lubavitch, Rabbi Yosef Yitzchak Schneersohn. The ruling was based on the idea that a Rebbe is not a private individual but a communal figure synonymous with the body of Chassidim. The Lubavitcher Rebbe (Rabbi Yosef Yitzchak's son-in-law and successor) urged that the occasion be marked with time devoted to study from Torah books ("sefarim") as well as the acquisition of new Torah books.
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The Rebbe's Library
In 434 BCE, Nebuchadnezzar king of Babylon invaded Judea, exiling King Jehoiachin and thousands of Judean notables to Babylon. Eleven years later, the Nebuchadnezzar’s army invaded Jerusalem again, setting fire to the Temple and massacring its inhabitants. The tragic news reached the Babylonian exiles five months later, on 5 Teves 422 BCE (Ezekiel 33:21). According to a minority opinion, this day is commemorated as a fast day (Talmud, Tractate Rosh Hashanah 18b).
Shlomo was raised as a hidden Jew and served at the royal court in Lisbon, Portugal. When the enigmatic David HaReuveini appeared in Portugal, claiming to hail from the Ten Lost Tribes, Shlomo was inspired to return to Judaism. So as not to be indicted by the Inquisition for abandoning Christianity, R. Shlomo traveled to Salonica, Turkey, and then to Safed, Israel, where he delved into the intricacies of Kabbalah. Sadly, the Inquisition caught up to him and he was given the choice of accepting Christianity or being burned at the stake. R. Shlomo chose the latter, and he was killed in Mantua, Italy, meriting to sanctify G‑d’s name.
Link: Is a Jew Required to Die Rather than Disobey a Torah Command?
Look deeply and you will see that the Torah does not know of man and woman as separate beings.
Each act is performed once through a single body—a body that in our world may appear as two, but which the Torah sees as one.
On the contrary, for both to be assigned the same mitzvah would be redundant, for why should one half of the body do that which the other has already accomplished?
Just as a man fulfills the mitzvah to be fruitful and multiply through the agency of his female counterpart, so does a woman wrap tefillin or wear tzitzit on the body of her male counterpart.
For just as man and woman were first created as a single form, so too, before each soul descends below, they begin as one.
It may be at times that only half a soul must descend for its divine mission, while the other half waits patiently above. And when it will return, they will merge once again.