| Holiday | Sun | Mon | Tue | Wed | Thu | Fri | Shabbos | This Year |
|---|---|---|---|---|---|---|---|---|
|
Rosh Hashanah
ראש השנה · א׳ תשרי
|
|
Sep 20, 1990 | ||||||
|
Yom Kippur
יום כיפור · י׳ תשרי
|
|
Sep 29, 1990 | ||||||
|
Sukkos
סוכות · ט״ו תשרי
|
|
Oct 4, 1990 | ||||||
|
Hoshana Rabba
הושענא רבה · כ״א תשרי
|
|
Oct 10, 1990 | ||||||
|
Shemini Atzeres
שמיני עצרת · כ״ב תשרי
|
|
Oct 11, 1990 | ||||||
|
Simchas Torah
שמחת תורה · כ״ג תשרי
|
|
Oct 12, 1990 | ||||||
|
Chanukah
חנוכה · כ״ה כסלו
|
|
Dec 12, 1990 | ||||||
|
Tu BiShvat
ט״ו בשבט · ט״ו שבט
|
|
Jan 30, 1991 | ||||||
|
Purim
פורים · י״ד אדר
|
|
Feb 28, 1991 | ||||||
|
Pesach
פסח · ט״ו ניסן
|
|
Mar 30, 1991 | ||||||
|
Shavuos
שבועות · ו׳ סיון
|
|
May 19, 1991 | ||||||
|
17 Tammuz
י״ז בתמוז · י״ז תמוז
|
|
Jun 29, 1991 | ||||||
|
Tisha B'Av
תשעה באב · ט׳ אב
|
|
Jul 20, 1991 | ||||||
How does this work?
The Jewish calendar follows fixed arithmetic rules that determine which day of the week each holiday can fall on. There are exactly 14 possible year types (keviyot / קביעות), each determining the day of the week for every holiday in that year.
Rosh Hashanah never falls on Sunday, Wednesday, or Friday. This prevents Yom Kippur from being adjacent to Shabbos and Hoshana Rabba from falling on Shabbos.
Pesach never falls on Monday, Wednesday, or Friday. This is a mathematical consequence of Lo ADU combined with the structure of the year.
A mnemonic pairing holidays that always fall on the same day of the week: Tisha B'Av = 1st day Pesach, Shavuos = 2nd day Pesach, Rosh Hashanah = 3rd day Pesach, Simchas Torah = 4th day Pesach, Yom Kippur = 5th day Pesach, Purim (previous) = 6th day Pesach.