Holiday Day of Week Chart

Year 3815

Possible This year (3815) Never
Rosh Hashanah ראש השנה
Sep 21, 0054
S
M
T
W
T
F
Sh
Yom Kippur יום כיפור
Sep 30, 0054
S
M
T
W
T
F
Sh
Sukkos סוכות
Oct 5, 0054
S
M
T
W
T
F
Sh
Hoshana Rabba הושענא רבה
Oct 11, 0054
S
M
T
W
T
F
Sh
Shemini Atzeres שמיני עצרת
Oct 12, 0054
S
M
T
W
T
F
Sh
Simchas Torah שמחת תורה
Oct 13, 0054
S
M
T
W
T
F
Sh
Chanukah חנוכה
Dec 14, 0054
S
M
T
W
T
F
Sh
Tu BiShvat ט״ו בשבט
Feb 1, 0055
S
M
T
W
T
F
Sh
Purim פורים
Mar 2, 0055
S
M
T
W
T
F
Sh
Pesach פסח
Apr 1, 0055
S
M
T
W
T
F
Sh
Shavuos שבועות
May 21, 0055
S
M
T
W
T
F
Sh
17 Tammuz י״ז בתמוז
Jul 1, 0055
S
M
T
W
T
F
Sh
Tisha B'Av תשעה באב
Jul 22, 0055
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 3815

Rosh Hashanah א׳ תשרי
Saturday
Sep 21, 0054
Yom Kippur י׳ תשרי
Monday
Sep 30, 0054
Sukkos ט״ו תשרי
Saturday
Oct 5, 0054
Hoshana Rabba כ״א תשרי
Friday
Oct 11, 0054
Shemini Atzeres כ״ב תשרי
Saturday
Oct 12, 0054
Simchas Torah כ״ג תשרי
Sunday
Oct 13, 0054
Chanukah כ״ה כסלו
Saturday
Dec 14, 0054
Tu BiShvat ט״ו שבט
Saturday
Feb 1, 0055
Purim י״ד אדר
Sunday
Mar 2, 0055
Pesach ט״ו ניסן
Tuesday
Apr 1, 0055
Shavuos ו׳ סיון
Wednesday
May 21, 0055
17 Tammuz י״ז תמוז
Tuesday
Jul 1, 0055
Tisha B'Av ט׳ אב
Tuesday
Jul 22, 0055