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Mishnah 40 of 41
אִם אֶשְׁכָּחֵךְ יְרוּשָׁלָיִם
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נושא · Topicהַמּוֹעֲדִים וְהַפְסָקַת הָאֲבֵלוּתWhether the festivals interrupt mourning
Mishnah מועד קטן ג׳:ו׳ · Moed Katan 3:6
רַבִּי אֱלִיעֶזֶר אוֹמֵר, מִשֶּׁחָרַב בֵּית הַמִּקְדָּשׁ, עֲצֶרֶת כְּשַׁבָּת.
רַבָּן גַּמְלִיאֵל אוֹמֵר, רֹאשׁ הַשָּׁנָה וְיוֹם הַכִּפּוּרִים, כָּרְגָלִים.
וַחֲכָמִים אוֹמְרִים, לֹא כְדִבְרֵי זֶה וְלֹא כְדִבְרֵי זֶה,
אֶלָּא עֲצֶרֶת כָּרְגָלִים, רֹאשׁ הַשָּׁנָה וְיוֹם הַכִּפּוּרִים כְּשַׁבָּת.
Rabbi Eliezer says: after the Beis HaMikdash was destroyed, Atzeres is like Shabbos.
Rabban Gamliel says: Rosh Hashanah and Yom Kippur are like the regalim.
And the Chachamim say: neither like this one nor like that one,
but rather Atzeres is like the regalim, and Rosh Hashanah and Yom Kippur are like Shabbos.
case/objectrestrictive rulingpermissive rulingTanna
Transcript
Summary Chart
Whether the festivals interrupt mourning
CaseRulingReason
Does Shavuos (Atzeres) interrupt the shiva?Rabbi Eliezer: Like Shabbos — it does not interrupt
Chachamim: Like a regel — it interrupts
Do Rosh Hashanah and Yom Kippur interrupt the shiva?Rabban Gamliel: Like regalim — they interrupt
Chachamim: Like Shabbos — they do not interrupt
All Meforshim
Mishnah Insights
Which festivals interrupt mourning after the Churban — and why Atzeres changed
עֲשֵׂה לְךָ רַב
R' Eliezer (ben Hyrcanus) — HaGadol · Dor 2 · Yavneh — רַבִּי אֱלִיעֶזֶר

A leading talmid of Rabban Yochanan ben Zakkai, who said of him that he is ‘a plastered cistern that loses not a drop,’ and that were all the Sages on one scale and R’ Eliezer on the other, he would outweigh them (Avos 2:8). He came to Torah late, rose to be a pillar of the Yavneh generation, and often ruled in the way of Beis Shammai. In the episode of the oven of Achnai a Heavenly voice took his side, yet the halacha followed the majority, for ‘the Torah is not in Heaven’ (Bava Metzia 59b).

Which festivals interrupt mourning, and which only count

The dispute turns on a single distinction: one of the shalosh regalim cancels the seven days of mourning outright (it is mafsik), while a Shabbos counts toward the seven but does not interrupt them. The Chachamim, whom the halacha follows, hold Atzeres is a regel that interrupts, and that Rosh Hashanah and Yom Kippur are like Shabbos (Bartenura, Rambam).

Why the Churban changed Atzeres

R’ Eliezer ties Atzeres’s standing to the Mikdash. Most meforshim explain that while the Beis HaMikdash stood, one who missed Atzeres’s offering had seven days of tashlumin to bring it, giving Atzeres a seven-day, regel-like weight that interrupted mourning (the Ran, in Tosafos Yom Tov). Mishnat Eretz Yisrael adds a plainer reason: with the Churban, Atzeres lost its mitzvos hayom — the shtei halechem and the opening of the bikkurim season — and, stripped of what set it apart, its regel-force naturally fell to that of Shabbos.

Series Insights
Series context

Where this sits

The Churban reaches even into the laws of mourning. Atzeres’s weight as a festival rested on its own mitzvos hayom — the shtei halechem and the bikkurim season it opened — and when the Mikdash fell and those ceased, R’ Eliezer holds its power to interrupt aveilus fell away with them. It is a quiet instance of the series’ theme: the destruction did not only end the avodah, it reset the weight of mitzvos that had leaned on it.

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