I was curious about this hypothetical situation.

If Yom Kippur would fall on Sunday, Motzei Shabbat, so immediately when Shabbat ends, Yom Kippur starts. Would there be some sort of separation, בין קודש לקודש, as we have when Yom Tov is Motzei Shabbat (in Shmoneh Esrei and Kiddush)? Would we light candles?

The core of the question is, which has a higher kedusha?

On the one hand, Yom Kippur is called שבת שבתון, while Shabbat is only called שבת. On the other hand, we have 7 aliyot on Shabbat, and only 6 on Yom Kippur.

This question may actually become practical when we return בע"ה to the Sanhedrin setting each month's calendar.

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    In Shmot, 35:2, Shabbat is also called Shabbat shabbaton: שֵׁשֶׁת יָמִים תֵּעָשֶׂה מְלָאכָה וּבַיּוֹם הַשְּׁבִיעִי יִהְיֶה לָכֶם קֹדֶשׁ שַׁבַּת שַׁבָּתוֹן לַיקֹוָק כָּל־הָעֹשֶׂה בוֹ מְלָאכָה יוּמָת
    – rosends
    Mar 25, 2014 at 12:53
  • @Danno Someone (i don't remember who) says that this is actually referring to six days of Yom Tov (Pesach * 2, Sukkot * 2, Shavuot, Rosh Hashanah) and Yom Kippur.
    – Scimonster
    Mar 25, 2014 at 13:06
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    +1, and I second Bruce James's welcome. But re "Would we light candles?": that seems highly improbable, as candle-lighting is a m'lacha, forbidden labor, on Yom Kipur. We don't, for example, light candles once Shabas (any week) or YK (any day of the week) has already begun, or toward the end of Shabas for any Sunday yom tov.
    – msh210
    Mar 25, 2014 at 14:11
  • @msh210 I agree that lighting candles would be unlikely, but i was curious anyhow.
    – Scimonster
    Mar 25, 2014 at 14:15

2 Answers 2


This is discussed in the Talmud (Shabbat 114) and the Rambam rules (Shabbat 5:21) that no Havdallah is recited after Shabbat when Yom Kippur falls on Sunday.

  • You might be interested in Rambam Eruvin 8:10 or Shabbat 23:25.
    – Double AA
    Mar 25, 2014 at 14:21
  • Thank you. That Rambam is indeed interesting. It also seems to imply that if Yom Kippur is on Friday, we don't make havdalah between them, because they have the same level. The Gemara (and Rambam's quote) didn't deal with that case.
    – Scimonster
    Mar 25, 2014 at 14:24

The calendar is set such that Yom Kippur CANNOT occur on a Sunday. Even if we went back to a system where the Sandhedrin declared the new moon, the problem remains of back to back shabbats. This creates problems with regard to food preparation. You would have to prepare food for both shabbat AND breaking fast Sunday night on Friday. In other words, your hypothetical can't happen. For the same reason, Yom Kippur cannot occur on a Friday. You would still have back to back shabbats.

  • And would it be so terrible to have back-to-back shabbatot? People already end up preparing food for both Shabbat and Yom Tov when they are back-to-back. And i don't think that food is the actual problem here.
    – Scimonster
    Mar 25, 2014 at 12:36
  • Actually, it is. Your description is not accurate. Food preparation IS PERMITTED on Yom Tov, but not on shabbos or Yom Kippur. In ancient times, it was possible to prepare food to last through the 25 or so hours of shabbos, but if you add another 25 hours, it would not be possible to have food last 50 or so hours. The rabbis in ancient times were careful not to make halakha too hard for the people to observe.
    – Dennis
    Mar 25, 2014 at 12:51
  • If you have Yom Tov on Motzei Shabbat, you don't have a lot of time to prepare some food. In any case, food isn't the question. This is modern and future times, where we do have technology to preserve food. Additionally, break-the-fast could be as simple as picking fresh fruit if it came to it.
    – Scimonster
    Mar 25, 2014 at 13:05
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    I move for this non-answer to be deleted.
    – Double AA
    Mar 25, 2014 at 14:16
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    @DoubleAA, IMHO, it is fine to answer a hypothetical Halachic question with saying it is Halachically impossible (I think you could find examples of exactly that response in the Talmud). It is just that in this case it is wrong to say it is Halachically impossible. So I would say it is an answer, just in this case a wrong one.
    – Yishai
    Mar 25, 2014 at 14:37

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