Holiday Day of Week Chart

Year 6631

Possible This year (6631) Never
Rosh Hashanah ראש השנה
Sep 18, 2870
S
M
T
W
T
F
Sh
Yom Kippur יום כיפור
Sep 27, 2870
S
M
T
W
T
F
Sh
Sukkos סוכות
Oct 2, 2870
S
M
T
W
T
F
Sh
Hoshana Rabba הושענא רבה
Oct 8, 2870
S
M
T
W
T
F
Sh
Shemini Atzeres שמיני עצרת
Oct 9, 2870
S
M
T
W
T
F
Sh
Simchas Torah שמחת תורה
Oct 10, 2870
S
M
T
W
T
F
Sh
Chanukah חנוכה
Dec 10, 2870
S
M
T
W
T
F
Sh
Tu BiShvat ט״ו בשבט
Jan 27, 2871
S
M
T
W
T
F
Sh
Purim פורים
Mar 27, 2871
S
M
T
W
T
F
Sh
Pesach פסח
Apr 26, 2871
S
M
T
W
T
F
Sh
Shavuos שבועות
Jun 15, 2871
S
M
T
W
T
F
Sh
17 Tammuz י״ז בתמוז
Jul 26, 2871
S
M
T
W
T
F
Sh
Tisha B'Av תשעה באב
Aug 16, 2871
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 6631

Rosh Hashanah א׳ תשרי
Thursday
Sep 18, 2870
Yom Kippur י׳ תשרי
Saturday
Sep 27, 2870
Sukkos ט״ו תשרי
Thursday
Oct 2, 2870
Hoshana Rabba כ״א תשרי
Wednesday
Oct 8, 2870
Shemini Atzeres כ״ב תשרי
Thursday
Oct 9, 2870
Simchas Torah כ״ג תשרי
Friday
Oct 10, 2870
Chanukah כ״ה כסלו
Wednesday
Dec 10, 2870
Tu BiShvat ט״ו שבט
Tuesday
Jan 27, 2871
Purim י״ד אדר
Friday
Mar 27, 2871
Pesach ט״ו ניסן
Sunday
Apr 26, 2871
Shavuos ו׳ סיון
Monday
Jun 15, 2871
17 Tammuz י״ז תמוז
Sunday
Jul 26, 2871
Tisha B'Av ט׳ אב
Sunday
Aug 16, 2871