Holiday Day of Week Chart

Year 3909

Possible This year (3909) Never
Rosh Hashanah ראש השנה
Sep 1, 0148
S
M
T
W
T
F
Sh
Yom Kippur יום כיפור
Sep 10, 0148
S
M
T
W
T
F
Sh
Sukkos סוכות
Sep 15, 0148
S
M
T
W
T
F
Sh
Hoshana Rabba הושענא רבה
Sep 21, 0148
S
M
T
W
T
F
Sh
Shemini Atzeres שמיני עצרת
Sep 22, 0148
S
M
T
W
T
F
Sh
Simchas Torah שמחת תורה
Sep 23, 0148
S
M
T
W
T
F
Sh
Chanukah חנוכה
Nov 24, 0148
S
M
T
W
T
F
Sh
Tu BiShvat ט״ו בשבט
Jan 12, 0149
S
M
T
W
T
F
Sh
Purim פורים
Mar 12, 0149
S
M
T
W
T
F
Sh
Pesach פסח
Apr 11, 0149
S
M
T
W
T
F
Sh
Shavuos שבועות
May 31, 0149
S
M
T
W
T
F
Sh
17 Tammuz י״ז בתמוז
Jul 11, 0149
S
M
T
W
T
F
Sh
Tisha B'Av תשעה באב
Aug 1, 0149
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 3909

Rosh Hashanah א׳ תשרי
Saturday
Sep 1, 0148
Yom Kippur י׳ תשרי
Monday
Sep 10, 0148
Sukkos ט״ו תשרי
Saturday
Sep 15, 0148
Hoshana Rabba כ״א תשרי
Friday
Sep 21, 0148
Shemini Atzeres כ״ב תשרי
Saturday
Sep 22, 0148
Simchas Torah כ״ג תשרי
Sunday
Sep 23, 0148
Chanukah כ״ה כסלו
Saturday
Nov 24, 0148
Tu BiShvat ט״ו שבט
Saturday
Jan 12, 0149
Purim י״ד אדר
Tuesday
Mar 12, 0149
Pesach ט״ו ניסן
Thursday
Apr 11, 0149
Shavuos ו׳ סיון
Friday
May 31, 0149
17 Tammuz י״ז תמוז
Thursday
Jul 11, 0149
Tisha B'Av ט׳ אב
Thursday
Aug 1, 0149