What is gimmel tammuz?

Gimmel Tammuz (the 3rd of Tammuz) is significant in Jewish tradition for two distinct reasons: it is the date of a biblical miracle recorded in the Book of Joshua, and in recent history, it became the yahrzeit (death anniversary) of Rabbi Menachem Mendel Schneerson, the seventh Lubavitcher Rebbe, who passed away on this date in 1994. The day carries different weight depending on one's community and background.

Key Takeaways

Gimmel Tammuz literally means "the 3rd of Tammuz," the third day of the Hebrew month of Tammuz.
In the Tanakh, it is the date the sun stood still for Joshua during the battle of Givon (Joshua 10:12-13).
It is the yahrzeit of the Lubavitcher Rebbe, Rabbi Menachem Mendel Schneerson, who passed away on 3 Tammuz 5754 (June 12, 1994).
The date appears in several historical responsa literature simply as a calendar marker for dating letters and rulings.
The day is observed with special intensity in Chabad-Lubavitch communities worldwide.

The Biblical Significance: The Sun Stands Still

The earliest significance of Gimmel Tammuz comes from Sefer Yehoshua (the Book of Joshua), chapter 10.

During the battle against the five Amorite kings at Givon, Joshua prayed for the sun to stop so the Israelites could complete their victory before nightfall:

"שֶׁמֶשׁ בְּגִבְעוֹן דּוֹם" — "Sun, stand still at Gibeon!" [Joshua 10:12]

The verse continues: "וַיִּדֹּם הַשֶּׁמֶשׁ וְיָרֵחַ עָמָד" — "And the sun stood still, and the moon stopped" [Joshua 10:13].

According to tradition, this miracle occurred on 3 Tammuz, making it a day historically associated with miraculous divine intervention in Jewish history.

Historical Use as a Calendar Date

The retrieved sources illustrate how Gimmel Tammuz functioned simply as a standard calendar date in halachic correspondence:

[Binyan Tziyon 113:1] is dated "יום ג' ג' תמוז שנת תר"ח" — Tuesday, 3 Tammuz 5608 (1848), a letter from the Hamburg rabbinate.
[Teshuvot Maharsham Volume II, 37:1] is dated "ג' תמוז תרנ"ח" — 3 Tammuz 5658 (1898).
[Rav Pe'alim Volume IV, Even HaEzer 1] references events that occurred "after 3 Tammuz" in a case concerning kiddushin (betrothal).

These sources show that before 1994, Gimmel Tammuz was simply a date on the Jewish calendar — used to timestamp responsa and legal documents — without broader communal significance.

The Yahrzeit of the Lubavitcher Rebbe

The most widely recognized modern significance of Gimmel Tammuz is the passing of Rabbi Menachem Mendel Schneerson (1902–1994), the seventh Rebbe of Chabad-Lubavitch, one of the most influential Jewish leaders of the 20th century.

Who Was the Rebbe?

The Rebbe was a towering figure in post-Holocaust Jewish renewal. He built Chabad into a global movement with thousands of shluchim (emissaries) in virtually every country in the world. He emphasized:

Jewish outreach (kiruv) to unaffiliated Jews
The imminence of the Geulah (Redemption) and Moshiach
The divine mission of every individual Jew
Joy (simcha) as a foundation of Jewish life

How Chabad Observes the Day

On Gimmel Tammuz, Chabad Hasidim worldwide:

Travel to the Rebbe's Ohel (gravesite) in Queens, New York, to pray
Study the Rebbe's Torah teachings
Gather for farbrengens (Hasidic gatherings of inspiration and song)
Reflect on their personal commitment to the Rebbe's mission

A Note on Theological Complexity

The Rebbe's passing generated profound theological reflection within Chabad, particularly given the movement's strong emphasis on the Rebbe as a potential Moshiach (Messiah). Different segments within Chabad have approached this question differently — this remains an internal and ongoing discussion. Mainstream Orthodox authorities generally treat Gimmel Tammuz as a yahrzeit for a great Torah sage.

The Month of Tammuz in the Jewish Calendar

Tammuz is generally considered a month of difficulty in the Jewish calendar:

17 Tammuz (Shiva Asar b'Tammuz) is a fast day commemorating the breach of Jerusalem's walls, beginning the Three Weeks of mourning leading to Tisha B'Av.
The month's challenging character makes Gimmel Tammuz, with its themes of both miracle (Joshua) and loss (the Rebbe's passing), particularly resonant.

For personal guidance on how to observe or relate to this day, consult your local rabbi or posek.