Holiday Day of Week Chart

Year 5664

Possible This year (5664) Never
Rosh Hashanah ראש השנה
Sep 22, 1903
S
M
T
W
T
F
Sh
Yom Kippur יום כיפור
Oct 1, 1903
S
M
T
W
T
F
Sh
Sukkos סוכות
Oct 6, 1903
S
M
T
W
T
F
Sh
Hoshana Rabba הושענא רבה
Oct 12, 1903
S
M
T
W
T
F
Sh
Shemini Atzeres שמיני עצרת
Oct 13, 1903
S
M
T
W
T
F
Sh
Simchas Torah שמחת תורה
Oct 14, 1903
S
M
T
W
T
F
Sh
Chanukah חנוכה
Dec 14, 1903
S
M
T
W
T
F
Sh
Tu BiShvat ט״ו בשבט
Feb 1, 1904
S
M
T
W
T
F
Sh
Purim פורים
Mar 1, 1904
S
M
T
W
T
F
Sh
Pesach פסח
Mar 31, 1904
S
M
T
W
T
F
Sh
Shavuos שבועות
May 20, 1904
S
M
T
W
T
F
Sh
17 Tammuz י״ז בתמוז
Jun 30, 1904
S
M
T
W
T
F
Sh
Tisha B'Av תשעה באב
Jul 21, 1904
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 5664

Rosh Hashanah א׳ תשרי
Tuesday
Sep 22, 1903
Yom Kippur י׳ תשרי
Thursday
Oct 1, 1903
Sukkos ט״ו תשרי
Tuesday
Oct 6, 1903
Hoshana Rabba כ״א תשרי
Monday
Oct 12, 1903
Shemini Atzeres כ״ב תשרי
Tuesday
Oct 13, 1903
Simchas Torah כ״ג תשרי
Wednesday
Oct 14, 1903
Chanukah כ״ה כסלו
Monday
Dec 14, 1903
Tu BiShvat ט״ו שבט
Monday
Feb 1, 1904
Purim י״ד אדר
Tuesday
Mar 1, 1904
Pesach ט״ו ניסן
Thursday
Mar 31, 1904
Shavuos ו׳ סיון
Friday
May 20, 1904
17 Tammuz י״ז תמוז
Thursday
Jun 30, 1904
Tisha B'Av ט׳ אב
Thursday
Jul 21, 1904