<Ul> <Li> The eruv tavshilin is prepared on Erev Pesach (diaspora only) and on Erev Shavuot . </Li> <Li> In the diaspora, the second day of Shavuot falls on Shabbat, the only time Shavuot ever falls on Shabbat . (In Israel, Shavuot never falls on Shabbat .) </Li> <Li> Rosh Hashanah, Sukkot, and Shemini Atzeret all start on Shabbat . On Rosh Hashanah, since blowing the Shofar is not permitted on Shabbat, the shofar is blown only on the second day . Tashlich is also postponed to the second day . On Sukkot, the Four Species, which are not taken on Shabbat, are not used on the first day . </Li> <Li> Chanukah will begin on either Friday or Shabbat . If on Friday, then the Shabbat of Miketz will not be during Chanukah; this is the only case in which this will occur (and where Miketz's proper haftarah will thus be read). If Chanukah begins on Shabbat, there will be two Shabbatot of Chanukah, since the holiday is eight days long . </Li> <Li> The 10th of Tevet has the potential to fall on Friday, the only public fast that can possibly be observed on a Friday . The fast is not broken until about an hour after Shabbat begins . </Li> <Li> Purim Katan, the holiday that only occurs in leap years, has the potential to fall on Friday . </Li> </Ul> <Li> The eruv tavshilin is prepared on Erev Pesach (diaspora only) and on Erev Shavuot . </Li> <Li> In the diaspora, the second day of Shavuot falls on Shabbat, the only time Shavuot ever falls on Shabbat . (In Israel, Shavuot never falls on Shabbat .) </Li> <Li> Rosh Hashanah, Sukkot, and Shemini Atzeret all start on Shabbat . On Rosh Hashanah, since blowing the Shofar is not permitted on Shabbat, the shofar is blown only on the second day . Tashlich is also postponed to the second day . On Sukkot, the Four Species, which are not taken on Shabbat, are not used on the first day . </Li>

When was the last time yom kippur fell on shabbat