Holiday Day of Week Chart

Year 3840

Possible This year (3840) Never
Rosh Hashanah ראש השנה
Sep 16, 0079
S
M
T
W
T
F
Sh
Yom Kippur יום כיפור
Sep 25, 0079
S
M
T
W
T
F
Sh
Sukkos סוכות
Sep 30, 0079
S
M
T
W
T
F
Sh
Hoshana Rabba הושענא רבה
Oct 6, 0079
S
M
T
W
T
F
Sh
Shemini Atzeres שמיני עצרת
Oct 7, 0079
S
M
T
W
T
F
Sh
Simchas Torah שמחת תורה
Oct 8, 0079
S
M
T
W
T
F
Sh
Chanukah חנוכה
Dec 8, 0079
S
M
T
W
T
F
Sh
Tu BiShvat ט״ו בשבט
Jan 26, 0080
S
M
T
W
T
F
Sh
Purim פורים
Feb 24, 0080
S
M
T
W
T
F
Sh
Pesach פסח
Mar 25, 0080
S
M
T
W
T
F
Sh
Shavuos שבועות
May 14, 0080
S
M
T
W
T
F
Sh
17 Tammuz י״ז בתמוז
Jun 24, 0080
S
M
T
W
T
F
Sh
Tisha B'Av תשעה באב
Jul 15, 0080
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 3840

Rosh Hashanah א׳ תשרי
Thursday
Sep 16, 0079
Yom Kippur י׳ תשרי
Saturday
Sep 25, 0079
Sukkos ט״ו תשרי
Thursday
Sep 30, 0079
Hoshana Rabba כ״א תשרי
Wednesday
Oct 6, 0079
Shemini Atzeres כ״ב תשרי
Thursday
Oct 7, 0079
Simchas Torah כ״ג תשרי
Friday
Oct 8, 0079
Chanukah כ״ה כסלו
Wednesday
Dec 8, 0079
Tu BiShvat ט״ו שבט
Wednesday
Jan 26, 0080
Purim י״ד אדר
Thursday
Feb 24, 0080
Pesach ט״ו ניסן
Saturday
Mar 25, 0080
Shavuos ו׳ סיון
Sunday
May 14, 0080
17 Tammuz י״ז תמוז
Saturday
Jun 24, 0080
Tisha B'Av ט׳ אב
Saturday
Jul 15, 0080