Holiday Day of Week Chart

Year 4270

Possible This year (4270) Never
Rosh Hashanah ראש השנה
Aug 31, 0509
S
M
T
W
T
F
Sh
Yom Kippur יום כיפור
Sep 9, 0509
S
M
T
W
T
F
Sh
Sukkos סוכות
Sep 14, 0509
S
M
T
W
T
F
Sh
Hoshana Rabba הושענא רבה
Sep 20, 0509
S
M
T
W
T
F
Sh
Shemini Atzeres שמיני עצרת
Sep 21, 0509
S
M
T
W
T
F
Sh
Simchas Torah שמחת תורה
Sep 22, 0509
S
M
T
W
T
F
Sh
Chanukah חנוכה
Nov 23, 0509
S
M
T
W
T
F
Sh
Tu BiShvat ט״ו בשבט
Jan 11, 0510
S
M
T
W
T
F
Sh
Purim פורים
Mar 11, 0510
S
M
T
W
T
F
Sh
Pesach פסח
Apr 10, 0510
S
M
T
W
T
F
Sh
Shavuos שבועות
May 30, 0510
S
M
T
W
T
F
Sh
17 Tammuz י״ז בתמוז
Jul 10, 0510
S
M
T
W
T
F
Sh
Tisha B'Av תשעה באב
Jul 31, 0510
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 4270

Rosh Hashanah א׳ תשרי
Monday
Aug 31, 0509
Yom Kippur י׳ תשרי
Wednesday
Sep 9, 0509
Sukkos ט״ו תשרי
Monday
Sep 14, 0509
Hoshana Rabba כ״א תשרי
Sunday
Sep 20, 0509
Shemini Atzeres כ״ב תשרי
Monday
Sep 21, 0509
Simchas Torah כ״ג תשרי
Tuesday
Sep 22, 0509
Chanukah כ״ה כסלו
Monday
Nov 23, 0509
Tu BiShvat ט״ו שבט
Monday
Jan 11, 0510
Purim י״ד אדר
Thursday
Mar 11, 0510
Pesach ט״ו ניסן
Saturday
Apr 10, 0510
Shavuos ו׳ סיון
Sunday
May 30, 0510
17 Tammuz י״ז תמוז
Saturday
Jul 10, 0510
Tisha B'Av ט׳ אב
Saturday
Jul 31, 0510