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Hebrew month of Tishrei

תִּשְׁרֵי (transliterated Tishrei or Tishri) is the 7th month of the Hebrew year, is 30 days long, and corresponds to September or October on the Gregorian calendar.

The holiday that occurs on the 1st day of Tishrei is called Rosh Hashana, the Jewish New Year. Rosh Hashanah is a major holiday.

The first day of Tishrei is not considered Rosh Chodesh. Rosh Chodesh is a minor holiday that occurs at the beginning of every month on the Hebrew calendar. In the case of Tishrei, the major holiday of Rosh Hashana takes precedence.

Later in the month we observe Tzom Gedaliah on the 3rd, Yom Kippur on the 10th, Sukkot (from the 15th-21st), and Shmini Atzeret (on the 22nd) and Simchat Torah (on the 23rd in the Diaspora).

For more info, read The Month of Tishri – Judaism 101.

Asara B’Tevet in January or December

Asara B’Tevet / עֲשָׂרָה בְּטֵבֵת, the tenth day of the Hebrew month of Tevet, is a minor fast day in Judaism. The fast commemorates the siege of Jerusalem.

Although the Tenth of Tevet is an annual observance on the Hebrew calendar, the date can fall during December or January on the Gregorian calendar. In some Gregorian years, there is no observance of the fast. In other Gregorian years, the fast is observed twice.

For example, the Tenth of Tevet does not occur at all in during the Gregorian year 2024. The fast for Hebrew year 5785 will be observed in January 2025, and the Asara B’Tevet 5786 observance of the fast will be in occur in December 2025.

To illustrate further, consider the following 8-year table:

Hebrew DateGregorian Date
10 Tevet 5780Tuesday, January 7, 2020
10 Tevet 5781Friday, December 25, 2020
10 Tevet 5782Tuesday, December 14, 2021
10 Tevet 5783Tuesday, January 3, 2023
10 Tevet 5784Friday, December 22, 2023
10 Tevet 5785Friday, January 10, 2025
10 Tevet 5786Tuesday, December 30, 2025
10 Tevet 5787Sunday, December 20, 2026

Pesach on 15th of Nissan vs. the 14th

Why does Pesach begin on the 15th of Nisan when Numbers 28:16 says “And in the first month, on the fourteenth day of the month, is the LORD’S passover”?

Special thanks to Rabbi George Schlesinger for this guest post.

First of all, it’s helpful to know and understand the Hebrew and to know that in ancient days there were two sacrifices i.e. two holidays that were conjoined into one in later days. There was the Pascal sacrifice/Pascal holiday which was known as the “Pesach” or “passover.” This was an agricultural holiday celebrating springtime and the new lambs of the flock and it apparently preceded the Exodus from Egypt by many, many years. That sacrifice/holiday was on the 14th of Nisan. And it’s the term that in later days came to be used in Judaism for what was in ancient times a separate sacrifice/holiday celebrated a day later…the 15th of Nisan and the start of a 7 day festival during which matza was eaten. The holiday celebrating the Exodus is (in the Bible) usually called Chag HaMatzot or Festival of Matzah. So a more precise translation of verses 16 and 17 would read:

וּבַחֹ֣דֶשׁ הָרִאשׁ֗וֹן בְּאַרְבָּעָ֥ה עָשָׂ֛ר י֖וֹם לַחֹ֑דֶשׁ פֶּ֖סַח לַיהוָֽה׃

16) In the first month, on the fourteenth day of the month, there shall be a passover (pesach) sacrifice to the Lord

וּבַחֲמִשָּׁ֨ה עָשָׂ֥ר י֛וֹם לַחֹ֥דֶשׁ הַזֶּ֖ה חָ֑ג שִׁבְעַ֣ת יָמִ֔ים מַצּ֖וֹת יֵאָכֵֽל׃

17) and on the fifteenth day of that month a festival (chag). Unleavened bread shall be eaten for seven days.

To add just a little, I quote from the Jewish Publication Society’s commentary on the Book of Numbers on page 243:

“The day of the paschal offering and the seven-day Festival of Unleavened Bread are discrete holidays. Yet the fact that the paschal offering is mentioned even though it is a private sacrifice (see Exodus 12:1-11) –– and hence no description is given –– indicates that the two festivals are already fused.”

In later centuries, the two sacrifices were both made on the 14th of Nisan. The “pesach”/paschal offering earlier in the day than the offering for the Chag HaMatzot since that was the lamb that was to be eaten at the Seder commemorating the Exodus and it had to be slaughtered and roasted prior to sundown of the 15th so that it could be consumed during the Seder.

 

When do the Holidays begin?

In general, Jewish Holidays begin the evening before the date specified. This is because the Jewish day actually begins at sundown on the previous night. Sometimes, for clarity, the Erev holiday is also included to indicate that the holiday begins the evening before.

For example, in the April 2015 calendar below, Erev Pesach is listed as April 3rd and the first day of Pesach is listed as April 4th. This means that the holiday of Pesach begins on the evening on April 3rd.

And, Rosh Chodesh Iyyar is listed on April 19. This means that Rosh Chodesh begins on the evening of April 18, even though the Erev is not explicitly mentioned on the calendar.

April 2015

Sun Mon Tue Wed Thu Fri Sat
1 2 3

4

5

6

7

8

9

10

11

12 13 14 15 16

17 18
19

20

21 22

23

24 25
26 27 28 29 30

Minor fasts (Tzom GedaliahAsara B’TevetTa’anit EstherTa’anit Bechorot, and Tzom Tammuz) begin at dawn. Major fasts (Yom Kippur and Tish’a B’Av) begin the evening before.

Correction: Ta’anit Bechorot falls on Friday April 6, 2012

Ta’anit Bechorot (Fast of the Firstborn) falls on Friday, April 6, 2012. An earlier version of the calendar we publish incorrectly had this minor fast on Thursday.

When this fast day falls on Friday, we do in fact observe the fast on Friday, even though Shabbat follows immediately.

It is only in years when the date of the fast falls on Shabbat that the fast is moved. In this case, Ta’anit Bechorot is moved back to Thursday, because it is preferable not to fast immediately before Shabbat.

Source: Mishnah Berurah: the classic commentary to Shulchan Aruch Orach Chayim, comprising the laws of daily Jewish conduct, Volume V (B), Pesach. §470: “That the first-born fast on Erev Pesach.”