The first murder in history occurred on the 25th of Kislev in the year 41 from creation (3720 BCE), when Adam and Eve's eldest son, Cain, killed his younger brother, Abel, as recounted in the 4th chapter of Genesis.
Link:
Cain and Abel: The Story of the First Sibling Rivalry
Why Did Cain Kill Abel
The vessels, tapestries, wall sections and other components of the Mishkan (the portable sanctuary or "Tabernacle" built under Moses' direction to house the Divine Presence during the Israelites' journeys through the desert) were completed on the 25th of Kislev in the year 2449 from creation (1312 BCE). The Mishkan was not assembled, however, until 3 months later, when, beginning on Adar 25 of that year, it was erected and taken down daily for a 7-day "training" period prior to its dedication on the 1st of Nissan. Our Sages tell us that the day of Kislev 25 was compensated 12 centuries later, when the Maccabees dedicated the Holy Temple on Kislev 25, 3622 (139 BCE -- see below).
Links: The Mishkan described in the Torah and commentaries; from the Chassidic masters on the Mishkan
On the 25th of Kislev in the year 3622 from creation, the Maccabees liberated the Holy Temple in Jerusalem, after defeating the vastly more numerous and powerful armies of the Syrian-Greek king Antiochus IV, who had tried to forcefully uproot the beliefs and practices of Judaism from the people of Israel. The victorious Jews repaired, cleansed and rededicated the Temple to the service of G-d. But all the Temple's oil had been defiled by the pagan invaders; when the Jews sought to light the Temple's menorah (candelabra), they found only one small cruse of ritually pure olive oil. Miraculously, the one-day supply burned for eight days, until new, pure oil could be obtained. In commemoration, the Sages instituted the 8-day festival of Chanukah, on which lights are kindled nightly to recall and publicize the miracle.
Link: The Story of Chanukah
Kislev 25 is the yahrtzeit (date of passing) of Rabbi Chaim Chizkiah Medini (1832-1904), author of the Halachic encyclopedia Sdei Chemed.
This Shabbat is Shabbat Mevarchim (“the Shabbat that blesses" the new month): a special prayer is recited blessing the Rosh Chodesh ("Head of the Month") of the upcoming month of Tevet, which falls on Thursday and Friday of next week.
Prior to the blessing, we announce the precise time of the molad, the "birth" of the new moon. See molad times.
It is a Chabad custom to recite the entire book of Psalms before morning prayers, and to conduct farbrengens (chassidic gatherings) in the course of the Shabbat.
Links: Shabbat Mevarchim; Tehillim (the Book of Psalms); The Farbrengen
Special prayers of thanksgiving -- Hallel (in its full version) and V'Al HaNissim -- are added to the daily prayers and Grace After Meals on all eight days of Chanukah. Tachnun (confession of sins) and similar prayers are omitted for the duration of trhe festival.
Today is the first day of the eight-day festival of Chanukah. In commemoration of the miracle of the oil we kindle the Chanukah lights—oil lamps or candles—each evening for eight days, increasing the number of lights each evening.
In the Jewish calendar, the day begins at nightfall; thus, the first Chanukah light is kindled on the preceding evening, which is when the Hebrew date of Kislev 25 begins. Tonight is the eve of the 2nd day of Chanukah, so we kindle two lights in the Chanukah menorah.
IMPORTANT: Because of the prohibition to kindle fire on Shabbat, the Chanukah lights must be lit after the Havdalah service marking the end of Shabbat at nightfall.
Links:
Text and Audio of the Menorah Blessings
For additional Chanukah observances, see Laws & Customs
In tonight’s evening prayers, Dec 5., 2026, we insert the request for rain, “v’tein tal umatar,” in the amidah. We continue adding this request into the weekday prayers until the holiday of Passover.
There is an outer world and there is an inner world. As deep as you penetrate, as high as you reach, there is always something breathing inside.
The outer world is made of things. Breathing inside the things are words.
Words are the outside. Inside the words are stories.
The story is the outside. Inside the story is a thought.
Thoughts are the outside. Inside the thoughts is a great light.
At the origin of all light is the beginning that cannot be known.
The outside we can touch and come to know.
The inside—we must wait and be still, so that it may speak to us.
As it did at Sinai. As it does whenever we learn Torah with all our heart and soul.