Who knows three hundred twenty-one?

?אחד ועשרים ושלוש מאות - מי יודע

In the spirit of the song "Echad - mi yodeya", please post interesting and significant Jewish facts about the number 321.

Answers that only contain lazy gematria may be avoided like fire.

Check out for the previous three hundred twenty entries in this ongoing series.

Please include sources for your information wherever possible, as with all other answers on this site.

  • "avoided like fire"? It should be something that every one of us can do!
    – Tamir Evan
    Jan 26 '14 at 14:29

There are at most 321 days on which work is permitted per year, for those who live outside Israel. This occurs in a leap year starting on Shabbos, where Cheshvan and Kislev each have 30 days.

 385 days in the year
- 55 Shabbasos
- 13 days of Yom Tov
+  4 days of Yom Tov and Shabbos, which were double counted:
                                  Rosh Hashanah, Succos, Shemini Atzeres, and the 2nd day of Shavuos
 321 workdays
  • I originally posted this answer for 320, where I forgot to account for the 2nd day of Shavuos. judaism.stackexchange.com/questions/34026/…
    – Ypnypn
    Jan 26 '14 at 14:08
  • You count Yom Tov and not Chol HaMoed, yet both have some Melachot which are forbidden and some which are permitted.
    – Double AA
    Jan 26 '14 at 14:09
  • @DoubleAA According to the majority of Rishonim, on Chol HaMoed all work is allowed from the Torah, as opposed to Yom Tov. So it is a correct number on a Biblical level. Jan 28 '14 at 21:25
  • @YEZ Is Yom Tov Sheni Biblical??? And I don't think you should be dismissing those who hold work on Chol HaMoed is Biblical so easily...
    – Double AA
    Jan 28 '14 at 22:58
  • @DoubleAA That is true, but the prohibitions of Chol HaMoed are not in terms of Melacha according to the overwhelming majority of Rishonim. They are just to make Chol HaMoed distinct and not set aside for getting things done. Jan 29 '14 at 0:15

In the 321st year of the third millennium AM, Gad ben Ya'akov Avinu passed away at the age of 125.1

In the 321st year of the fourth millennium AM, the prophet Yirmeyahu delivered the prophecy about the Destruction described in Yirmeyahu 25. In the same year, he dictated a cautionary written work (either a large part of his eponymous book or Eicha) only to have King Yehoyakim burn it up dismissively, as described in Yirmeyahu 36.2

1. Seder Hadorot, Third Millennium, Year 321.

2. Ibid., Fourth Millennium, Year 321.

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