Holiday Day of Week Chart

Year 2646

Possible This year (2646) Never
Rosh Hashanah ראש השנה
Sep 15, -1115
S
M
T
W
T
F
Sh
Yom Kippur יום כיפור
Sep 24, -1115
S
M
T
W
T
F
Sh
Sukkos סוכות
Sep 29, -1115
S
M
T
W
T
F
Sh
Hoshana Rabba הושענא רבה
Oct 5, -1115
S
M
T
W
T
F
Sh
Shemini Atzeres שמיני עצרת
Oct 6, -1115
S
M
T
W
T
F
Sh
Simchas Torah שמחת תורה
Oct 7, -1115
S
M
T
W
T
F
Sh
Chanukah חנוכה
Dec 7, -1115
S
M
T
W
T
F
Sh
Tu BiShvat ט״ו בשבט
Jan 25, -1114
S
M
T
W
T
F
Sh
Purim פורים
Feb 23, -1114
S
M
T
W
T
F
Sh
Pesach פסח
Mar 25, -1114
S
M
T
W
T
F
Sh
Shavuos שבועות
May 14, -1114
S
M
T
W
T
F
Sh
17 Tammuz י״ז בתמוז
Jun 24, -1114
S
M
T
W
T
F
Sh
Tisha B'Av תשעה באב
Jul 15, -1114
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 2646

Rosh Hashanah א׳ תשרי
Tuesday
Sep 15, -1115
Yom Kippur י׳ תשרי
Thursday
Sep 24, -1115
Sukkos ט״ו תשרי
Tuesday
Sep 29, -1115
Hoshana Rabba כ״א תשרי
Monday
Oct 5, -1115
Shemini Atzeres כ״ב תשרי
Tuesday
Oct 6, -1115
Simchas Torah כ״ג תשרי
Wednesday
Oct 7, -1115
Chanukah כ״ה כסלו
Monday
Dec 7, -1115
Tu BiShvat ט״ו שבט
Monday
Jan 25, -1114
Purim י״ד אדר
Tuesday
Feb 23, -1114
Pesach ט״ו ניסן
Thursday
Mar 25, -1114
Shavuos ו׳ סיון
Friday
May 14, -1114
17 Tammuz י״ז תמוז
Thursday
Jun 24, -1114
Tisha B'Av ט׳ אב
Thursday
Jul 15, -1114