Holiday Day of Week Chart

Year 2670

Possible This year (2670) Never
Rosh Hashanah ראש השנה
Sep 19, -1091
S
M
T
W
T
F
Sh
Yom Kippur יום כיפור
Sep 28, -1091
S
M
T
W
T
F
Sh
Sukkos סוכות
Oct 3, -1091
S
M
T
W
T
F
Sh
Hoshana Rabba הושענא רבה
Oct 9, -1091
S
M
T
W
T
F
Sh
Shemini Atzeres שמיני עצרת
Oct 10, -1091
S
M
T
W
T
F
Sh
Simchas Torah שמחת תורה
Oct 11, -1091
S
M
T
W
T
F
Sh
Chanukah חנוכה
Dec 12, -1091
S
M
T
W
T
F
Sh
Tu BiShvat ט״ו בשבט
Jan 30, -1090
S
M
T
W
T
F
Sh
Purim פורים
Feb 28, -1090
S
M
T
W
T
F
Sh
Pesach פסח
Mar 30, -1090
S
M
T
W
T
F
Sh
Shavuos שבועות
May 19, -1090
S
M
T
W
T
F
Sh
17 Tammuz י״ז בתמוז
Jun 29, -1090
S
M
T
W
T
F
Sh
Tisha B'Av תשעה באב
Jul 20, -1090
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 2670

Rosh Hashanah א׳ תשרי
Monday
Sep 19, -1091
Yom Kippur י׳ תשרי
Wednesday
Sep 28, -1091
Sukkos ט״ו תשרי
Monday
Oct 3, -1091
Hoshana Rabba כ״א תשרי
Sunday
Oct 9, -1091
Shemini Atzeres כ״ב תשרי
Monday
Oct 10, -1091
Simchas Torah כ״ג תשרי
Tuesday
Oct 11, -1091
Chanukah כ״ה כסלו
Monday
Dec 12, -1091
Tu BiShvat ט״ו שבט
Monday
Jan 30, -1090
Purim י״ד אדר
Tuesday
Feb 28, -1090
Pesach ט״ו ניסן
Thursday
Mar 30, -1090
Shavuos ו׳ סיון
Friday
May 19, -1090
17 Tammuz י״ז תמוז
Thursday
Jun 29, -1090
Tisha B'Av ט׳ אב
Thursday
Jul 20, -1090