Holiday Day of Week Chart

Year 1400

Possible This year (1400) Never
Rosh Hashanah ראש השנה
Sep 21, -2361
S
M
T
W
T
F
Sh
Yom Kippur יום כיפור
Sep 30, -2361
S
M
T
W
T
F
Sh
Sukkos סוכות
Oct 5, -2361
S
M
T
W
T
F
Sh
Hoshana Rabba הושענא רבה
Oct 11, -2361
S
M
T
W
T
F
Sh
Shemini Atzeres שמיני עצרת
Oct 12, -2361
S
M
T
W
T
F
Sh
Simchas Torah שמחת תורה
Oct 13, -2361
S
M
T
W
T
F
Sh
Chanukah חנוכה
Dec 13, -2361
S
M
T
W
T
F
Sh
Tu BiShvat ט״ו בשבט
Jan 31, -2360
S
M
T
W
T
F
Sh
Purim פורים
Feb 29, -2360
S
M
T
W
T
F
Sh
Pesach פסח
Mar 30, -2360
S
M
T
W
T
F
Sh
Shavuos שבועות
May 19, -2360
S
M
T
W
T
F
Sh
17 Tammuz י״ז בתמוז
Jun 29, -2360
S
M
T
W
T
F
Sh
Tisha B'Av תשעה באב
Jul 20, -2360
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 1400

Rosh Hashanah א׳ תשרי
Thursday
Sep 21, -2361
Yom Kippur י׳ תשרי
Saturday
Sep 30, -2361
Sukkos ט״ו תשרי
Thursday
Oct 5, -2361
Hoshana Rabba כ״א תשרי
Wednesday
Oct 11, -2361
Shemini Atzeres כ״ב תשרי
Thursday
Oct 12, -2361
Simchas Torah כ״ג תשרי
Friday
Oct 13, -2361
Chanukah כ״ה כסלו
Wednesday
Dec 13, -2361
Tu BiShvat ט״ו שבט
Wednesday
Jan 31, -2360
Purim י״ד אדר
Thursday
Feb 29, -2360
Pesach ט״ו ניסן
Saturday
Mar 30, -2360
Shavuos ו׳ סיון
Sunday
May 19, -2360
17 Tammuz י״ז תמוז
Saturday
Jun 29, -2360
Tisha B'Av ט׳ אב
Saturday
Jul 20, -2360