Holiday Day of Week Chart

Year 6639

Possible This year (6639) Never
Rosh Hashanah ראש השנה
Sep 19, 2878
S
M
T
W
T
F
Sh
Yom Kippur יום כיפור
Sep 28, 2878
S
M
T
W
T
F
Sh
Sukkos סוכות
Oct 3, 2878
S
M
T
W
T
F
Sh
Hoshana Rabba הושענא רבה
Oct 9, 2878
S
M
T
W
T
F
Sh
Shemini Atzeres שמיני עצרת
Oct 10, 2878
S
M
T
W
T
F
Sh
Simchas Torah שמחת תורה
Oct 11, 2878
S
M
T
W
T
F
Sh
Chanukah חנוכה
Dec 11, 2878
S
M
T
W
T
F
Sh
Tu BiShvat ט״ו בשבט
Jan 28, 2879
S
M
T
W
T
F
Sh
Purim פורים
Mar 28, 2879
S
M
T
W
T
F
Sh
Pesach פסח
Apr 27, 2879
S
M
T
W
T
F
Sh
Shavuos שבועות
Jun 16, 2879
S
M
T
W
T
F
Sh
17 Tammuz י״ז בתמוז
Jul 27, 2879
S
M
T
W
T
F
Sh
Tisha B'Av תשעה באב
Aug 17, 2879
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 6639

Rosh Hashanah א׳ תשרי
Monday
Sep 19, 2878
Yom Kippur י׳ תשרי
Wednesday
Sep 28, 2878
Sukkos ט״ו תשרי
Monday
Oct 3, 2878
Hoshana Rabba כ״א תשרי
Sunday
Oct 9, 2878
Shemini Atzeres כ״ב תשרי
Monday
Oct 10, 2878
Simchas Torah כ״ג תשרי
Tuesday
Oct 11, 2878
Chanukah כ״ה כסלו
Sunday
Dec 11, 2878
Tu BiShvat ט״ו שבט
Saturday
Jan 28, 2879
Purim י״ד אדר
Tuesday
Mar 28, 2879
Pesach ט״ו ניסן
Thursday
Apr 27, 2879
Shavuos ו׳ סיון
Friday
Jun 16, 2879
17 Tammuz י״ז תמוז
Thursday
Jul 27, 2879
Tisha B'Av ט׳ אב
Thursday
Aug 17, 2879