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1. The Gemara explains why one is permitted to go, on Yom Tov (Friday), to the end of his Techum to establish a new residence for the second day (Shabbos).
2. The Mishnah discusses disputes about whether the two days of Rosh Hashanah are considered one long day or two separate days.
3. The Chachamim agree that on other Yamim Tovim, one may eat on the second day an egg laid on the first. (See #5 below.)
4. Rebbi Dosa ben Hurkinos says that in the Shemoneh Esreh of Rosh Hashanah, we should mention the uncertainty regarding which day is really Rosh Hashanah.
5. There was a controversy about a deer that was trapped by Nochrim on the first day of Yom Tov, and that was slaughtered by Jews on the following day.
A BIT MORE
1. Although a person may not linger at the end of the Techum in a way that shows that he is waiting for Shabbos or Yom Tov to end so that he may perform Melachah, establishing residence there is not a show of intent to do Melachah. Since people may think that there are other reasons why he is there that are unrelated to preparation for the next day, it is permitted.
2. For example, Rebbi Yehudah maintains that they are two separate days, and thus an egg laid on the first day may be eaten on the second day (see #3). The Chachamim maintain that they are considered like one long day, and thus an egg laid on the first day may not be eaten on the second day, as both days have the same degree of holiness.
3. This is because one of the days is not Yom Tov according to Torah law. Accordingly, if the first day was not Yom Tov, the egg was not prepared on Yom Tov for the following Yom Tov. If the first day was Yom Tov, then the second day is not Yom Tov and one may eat it the egg on an ordinary weekday.
4. He says that on the first day we should say, "whether it is today or tomorrow." On the second day we should say, "whether it is today or it was yesterday." The Chachamim argue that it should not be mentioned at all.
5. Rav Nachman and Rav Chisda ate from it, as they understood that the only problem on a second day of Yom Tov would be on a second day of Rosh Hashanah, not on a regular Yom Tov (see #3). Rav Sheshes did not eat from it, as he understood that Rebbi Yosi forbade this even on a second day of a regular Yom Tov.
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