Holiday Day of Week Chart

Year 3931

Possible This year (3931) Never
Rosh Hashanah ראש השנה
Aug 31, 0170
S
M
T
W
T
F
Sh
Yom Kippur יום כיפור
Sep 9, 0170
S
M
T
W
T
F
Sh
Sukkos סוכות
Sep 14, 0170
S
M
T
W
T
F
Sh
Hoshana Rabba הושענא רבה
Sep 20, 0170
S
M
T
W
T
F
Sh
Shemini Atzeres שמיני עצרת
Sep 21, 0170
S
M
T
W
T
F
Sh
Simchas Torah שמחת תורה
Sep 22, 0170
S
M
T
W
T
F
Sh
Chanukah חנוכה
Nov 22, 0170
S
M
T
W
T
F
Sh
Tu BiShvat ט״ו בשבט
Jan 9, 0171
S
M
T
W
T
F
Sh
Purim פורים
Mar 9, 0171
S
M
T
W
T
F
Sh
Pesach פסח
Apr 8, 0171
S
M
T
W
T
F
Sh
Shavuos שבועות
May 28, 0171
S
M
T
W
T
F
Sh
17 Tammuz י״ז בתמוז
Jul 8, 0171
S
M
T
W
T
F
Sh
Tisha B'Av תשעה באב
Jul 29, 0171
S
M
T
W
T
F
Sh

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.

Lo ADU — לא אד״ו

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.

Lo BaDU — לא בד״ו

Pesach never falls on Monday, Wednesday, or Friday. This is a mathematical consequence of Lo ADU combined with the structure of the year.

AT BASH — א״ת ב״ש

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.

Holiday Details for 3931

Rosh Hashanah א׳ תשרי
Thursday
Aug 31, 0170
Yom Kippur י׳ תשרי
Saturday
Sep 9, 0170
Sukkos ט״ו תשרי
Thursday
Sep 14, 0170
Hoshana Rabba כ״א תשרי
Wednesday
Sep 20, 0170
Shemini Atzeres כ״ב תשרי
Thursday
Sep 21, 0170
Simchas Torah כ״ג תשרי
Friday
Sep 22, 0170
Chanukah כ״ה כסלו
Wednesday
Nov 22, 0170
Tu BiShvat ט״ו שבט
Tuesday
Jan 9, 0171
Purim י״ד אדר
Friday
Mar 9, 0171
Pesach ט״ו ניסן
Sunday
Apr 8, 0171
Shavuos ו׳ סיון
Monday
May 28, 0171
17 Tammuz י״ז תמוז
Sunday
Jul 8, 0171
Tisha B'Av ט׳ אב
Sunday
Jul 29, 0171