Holiday Day of Week Chart

Year 4640

Possible This year (4640) Never
Rosh Hashanah ראש השנה
Sep 21, 0879
S
M
T
W
T
F
Sh
Yom Kippur יום כיפור
Sep 30, 0879
S
M
T
W
T
F
Sh
Sukkos סוכות
Oct 5, 0879
S
M
T
W
T
F
Sh
Hoshana Rabba הושענא רבה
Oct 11, 0879
S
M
T
W
T
F
Sh
Shemini Atzeres שמיני עצרת
Oct 12, 0879
S
M
T
W
T
F
Sh
Simchas Torah שמחת תורה
Oct 13, 0879
S
M
T
W
T
F
Sh
Chanukah חנוכה
Dec 13, 0879
S
M
T
W
T
F
Sh
Tu BiShvat ט״ו בשבט
Jan 30, 0880
S
M
T
W
T
F
Sh
Purim פורים
Feb 28, 0880
S
M
T
W
T
F
Sh
Pesach פסח
Mar 29, 0880
S
M
T
W
T
F
Sh
Shavuos שבועות
May 18, 0880
S
M
T
W
T
F
Sh
17 Tammuz י״ז בתמוז
Jun 28, 0880
S
M
T
W
T
F
Sh
Tisha B'Av תשעה באב
Jul 19, 0880
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 4640

Rosh Hashanah א׳ תשרי
Monday
Sep 21, 0879
Yom Kippur י׳ תשרי
Wednesday
Sep 30, 0879
Sukkos ט״ו תשרי
Monday
Oct 5, 0879
Hoshana Rabba כ״א תשרי
Sunday
Oct 11, 0879
Shemini Atzeres כ״ב תשרי
Monday
Oct 12, 0879
Simchas Torah כ״ג תשרי
Tuesday
Oct 13, 0879
Chanukah כ״ה כסלו
Sunday
Dec 13, 0879
Tu BiShvat ט״ו שבט
Saturday
Jan 30, 0880
Purim י״ד אדר
Sunday
Feb 28, 0880
Pesach ט״ו ניסן
Tuesday
Mar 29, 0880
Shavuos ו׳ סיון
Wednesday
May 18, 0880
17 Tammuz י״ז תמוז
Tuesday
Jun 28, 0880
Tisha B'Av ט׳ אב
Tuesday
Jul 19, 0880