Holiday Day of Week Chart

Year 5566

Possible This year (5566) Never
Rosh Hashanah ראש השנה
Sep 24, 1805
S
M
T
W
T
F
Sh
Yom Kippur יום כיפור
Oct 3, 1805
S
M
T
W
T
F
Sh
Sukkos סוכות
Oct 8, 1805
S
M
T
W
T
F
Sh
Hoshana Rabba הושענא רבה
Oct 14, 1805
S
M
T
W
T
F
Sh
Shemini Atzeres שמיני עצרת
Oct 15, 1805
S
M
T
W
T
F
Sh
Simchas Torah שמחת תורה
Oct 16, 1805
S
M
T
W
T
F
Sh
Chanukah חנוכה
Dec 16, 1805
S
M
T
W
T
F
Sh
Tu BiShvat ט״ו בשבט
Feb 3, 1806
S
M
T
W
T
F
Sh
Purim פורים
Mar 4, 1806
S
M
T
W
T
F
Sh
Pesach פסח
Apr 3, 1806
S
M
T
W
T
F
Sh
Shavuos שבועות
May 23, 1806
S
M
T
W
T
F
Sh
17 Tammuz י״ז בתמוז
Jul 3, 1806
S
M
T
W
T
F
Sh
Tisha B'Av תשעה באב
Jul 24, 1806
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 5566

Rosh Hashanah א׳ תשרי
Tuesday
Sep 24, 1805
Yom Kippur י׳ תשרי
Thursday
Oct 3, 1805
Sukkos ט״ו תשרי
Tuesday
Oct 8, 1805
Hoshana Rabba כ״א תשרי
Monday
Oct 14, 1805
Shemini Atzeres כ״ב תשרי
Tuesday
Oct 15, 1805
Simchas Torah כ״ג תשרי
Wednesday
Oct 16, 1805
Chanukah כ״ה כסלו
Monday
Dec 16, 1805
Tu BiShvat ט״ו שבט
Monday
Feb 3, 1806
Purim י״ד אדר
Tuesday
Mar 4, 1806
Pesach ט״ו ניסן
Thursday
Apr 3, 1806
Shavuos ו׳ סיון
Friday
May 23, 1806
17 Tammuz י״ז תמוז
Thursday
Jul 3, 1806
Tisha B'Av ט׳ אב
Thursday
Jul 24, 1806