Holiday Day of Week Chart

Year 1420

Possible This year (1420) Never
Rosh Hashanah ראש השנה
Sep 10, -2341
S
M
T
W
T
F
Sh
Yom Kippur יום כיפור
Sep 19, -2341
S
M
T
W
T
F
Sh
Sukkos סוכות
Sep 24, -2341
S
M
T
W
T
F
Sh
Hoshana Rabba הושענא רבה
Sep 30, -2341
S
M
T
W
T
F
Sh
Shemini Atzeres שמיני עצרת
Oct 1, -2341
S
M
T
W
T
F
Sh
Simchas Torah שמחת תורה
Oct 2, -2341
S
M
T
W
T
F
Sh
Chanukah חנוכה
Dec 3, -2341
S
M
T
W
T
F
Sh
Tu BiShvat ט״ו בשבט
Jan 21, -2340
S
M
T
W
T
F
Sh
Purim פורים
Mar 20, -2340
S
M
T
W
T
F
Sh
Pesach פסח
Apr 19, -2340
S
M
T
W
T
F
Sh
Shavuos שבועות
Jun 8, -2340
S
M
T
W
T
F
Sh
17 Tammuz י״ז בתמוז
Jul 19, -2340
S
M
T
W
T
F
Sh
Tisha B'Av תשעה באב
Aug 9, -2340
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 1420

Rosh Hashanah א׳ תשרי
Thursday
Sep 10, -2341
Yom Kippur י׳ תשרי
Saturday
Sep 19, -2341
Sukkos ט״ו תשרי
Thursday
Sep 24, -2341
Hoshana Rabba כ״א תשרי
Wednesday
Sep 30, -2341
Shemini Atzeres כ״ב תשרי
Thursday
Oct 1, -2341
Simchas Torah כ״ג תשרי
Friday
Oct 2, -2341
Chanukah כ״ה כסלו
Thursday
Dec 3, -2341
Tu BiShvat ט״ו שבט
Thursday
Jan 21, -2340
Purim י״ד אדר
Sunday
Mar 20, -2340
Pesach ט״ו ניסן
Tuesday
Apr 19, -2340
Shavuos ו׳ סיון
Wednesday
Jun 8, -2340
17 Tammuz י״ז תמוז
Tuesday
Jul 19, -2340
Tisha B'Av ט׳ אב
Tuesday
Aug 9, -2340