Holiday Day of Week Chart

Year 9639

Possible This year (9639) Never
Rosh Hashanah ראש השנה
Sep 24, 5878
S
M
T
W
T
F
Sh
Yom Kippur יום כיפור
Oct 3, 5878
S
M
T
W
T
F
Sh
Sukkos סוכות
Oct 8, 5878
S
M
T
W
T
F
Sh
Hoshana Rabba הושענא רבה
Oct 14, 5878
S
M
T
W
T
F
Sh
Shemini Atzeres שמיני עצרת
Oct 15, 5878
S
M
T
W
T
F
Sh
Simchas Torah שמחת תורה
Oct 16, 5878
S
M
T
W
T
F
Sh
Chanukah חנוכה
Dec 16, 5878
S
M
T
W
T
F
Sh
Tu BiShvat ט״ו בשבט
Feb 3, 5879
S
M
T
W
T
F
Sh
Purim פורים
Apr 3, 5879
S
M
T
W
T
F
Sh
Pesach פסח
May 3, 5879
S
M
T
W
T
F
Sh
Shavuos שבועות
Jun 22, 5879
S
M
T
W
T
F
Sh
17 Tammuz י״ז בתמוז
Aug 2, 5879
S
M
T
W
T
F
Sh
Tisha B'Av תשעה באב
Aug 23, 5879
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 9639

Rosh Hashanah א׳ תשרי
Tuesday
Sep 24, 5878
Yom Kippur י׳ תשרי
Thursday
Oct 3, 5878
Sukkos ט״ו תשרי
Tuesday
Oct 8, 5878
Hoshana Rabba כ״א תשרי
Monday
Oct 14, 5878
Shemini Atzeres כ״ב תשרי
Tuesday
Oct 15, 5878
Simchas Torah כ״ג תשרי
Wednesday
Oct 16, 5878
Chanukah כ״ה כסלו
Monday
Dec 16, 5878
Tu BiShvat ט״ו שבט
Monday
Feb 3, 5879
Purim י״ד אדר
Thursday
Apr 3, 5879
Pesach ט״ו ניסן
Saturday
May 3, 5879
Shavuos ו׳ סיון
Sunday
Jun 22, 5879
17 Tammuz י״ז תמוז
Saturday
Aug 2, 5879
Tisha B'Av ט׳ אב
Saturday
Aug 23, 5879