Holiday Day of Week Chart

Year 4580

Possible This year (4580) Never
Rosh Hashanah ראש השנה
Sep 24, 0819
S
M
T
W
T
F
Sh
Yom Kippur יום כיפור
Oct 3, 0819
S
M
T
W
T
F
Sh
Sukkos סוכות
Oct 8, 0819
S
M
T
W
T
F
Sh
Hoshana Rabba הושענא רבה
Oct 14, 0819
S
M
T
W
T
F
Sh
Shemini Atzeres שמיני עצרת
Oct 15, 0819
S
M
T
W
T
F
Sh
Simchas Torah שמחת תורה
Oct 16, 0819
S
M
T
W
T
F
Sh
Chanukah חנוכה
Dec 17, 0819
S
M
T
W
T
F
Sh
Tu BiShvat ט״ו בשבט
Feb 4, 0820
S
M
T
W
T
F
Sh
Purim פורים
Mar 4, 0820
S
M
T
W
T
F
Sh
Pesach פסח
Apr 3, 0820
S
M
T
W
T
F
Sh
Shavuos שבועות
May 23, 0820
S
M
T
W
T
F
Sh
17 Tammuz י״ז בתמוז
Jul 3, 0820
S
M
T
W
T
F
Sh
Tisha B'Av תשעה באב
Jul 24, 0820
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 4580

Rosh Hashanah א׳ תשרי
Saturday
Sep 24, 0819
Yom Kippur י׳ תשרי
Monday
Oct 3, 0819
Sukkos ט״ו תשרי
Saturday
Oct 8, 0819
Hoshana Rabba כ״א תשרי
Friday
Oct 14, 0819
Shemini Atzeres כ״ב תשרי
Saturday
Oct 15, 0819
Simchas Torah כ״ג תשרי
Sunday
Oct 16, 0819
Chanukah כ״ה כסלו
Saturday
Dec 17, 0819
Tu BiShvat ט״ו שבט
Saturday
Feb 4, 0820
Purim י״ד אדר
Sunday
Mar 4, 0820
Pesach ט״ו ניסן
Tuesday
Apr 3, 0820
Shavuos ו׳ סיון
Wednesday
May 23, 0820
17 Tammuz י״ז תמוז
Tuesday
Jul 3, 0820
Tisha B'Av ט׳ אב
Tuesday
Jul 24, 0820