Holiday Day of Week Chart

Year 5791

Possible This year (5791) Never
Rosh Hashanah ראש השנה
Sep 28, 2030
S
M
T
W
T
F
Sh
Yom Kippur יום כיפור
Oct 7, 2030
S
M
T
W
T
F
Sh
Sukkos סוכות
Oct 12, 2030
S
M
T
W
T
F
Sh
Hoshana Rabba הושענא רבה
S
M
T
W
T
F
Sh
Shemini Atzeres שמיני עצרת
S
M
T
W
T
F
Sh
Simchas Torah שמחת תורה
S
M
T
W
T
F
Sh
Chanukah חנוכה
Dec 21, 2030
S
M
T
W
T
F
Sh
Tu BiShvat ט״ו בשבט
Feb 8, 2031
S
M
T
W
T
F
Sh
Purim פורים
Mar 9, 2031
S
M
T
W
T
F
Sh
Pesach פסח
Apr 8, 2031
S
M
T
W
T
F
Sh
Shavuos שבועות
May 28, 2031
S
M
T
W
T
F
Sh
17 Tammuz י״ז בתמוז
Jul 8, 2031
S
M
T
W
T
F
Sh
Tisha B'Av תשעה באב
Jul 29, 2031
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 5791

Rosh Hashanah א׳ תשרי
Saturday
Sep 28, 2030
Yom Kippur י׳ תשרי
Monday
Oct 7, 2030
Sukkos ט״ו תשרי
Saturday
Oct 12, 2030
Hoshana Rabba כ״א תשרי
Shemini Atzeres כ״ב תשרי
Simchas Torah כ״ג תשרי
Chanukah כ״ה כסלו
Saturday
Dec 21, 2030
Tu BiShvat ט״ו שבט
Saturday
Feb 8, 2031
Purim י״ד אדר
Sunday
Mar 9, 2031
Pesach ט״ו ניסן
Tuesday
Apr 8, 2031
Shavuos ו׳ סיון
Wednesday
May 28, 2031
17 Tammuz י״ז תמוז
Tuesday
Jul 8, 2031
Tisha B'Av ט׳ אב
Tuesday
Jul 29, 2031