Questions about calendars. The Jewish calendar is a lunisolar calendar that determines the dates of Jewish festivals.

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What is the Sod HaIbbur?

What is the Sod HaIbbur (secret of impregnation)? I have seen it discussed in many places including the Pirkeu D'Rebbi Eliezer (8th chapter?) in reference to the intercalation for the lunar months of ...
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Concerning the time when Esther must be read

The first Mishnah in Tractate Megilla says: מגילה נקראת באחד עשר, בשנים עשר, בשלושה עשר, בארבעה עשר, ובחמישה עשר--לא פחות ולא יתר. The Megilla is read sometimes on the 11th, 12th, 13th, 14th, ...
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Did the people who followed the triennial cycle celebrate “Simchat Torah” in the same manner as those who followed the annual cycle?

I noticed this related question that briefly discusses Simchat Torah, but it mainly answers those that follow the annual cycle. People following the annual cycle clebrate Simchat Torah on a Yom Tov ...
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Is there a reference that explains the literal meaning and etymology of the names of the Hebrew months?

Is there a reference that explains the literal meaning and etymology of the names of the Hebrew months? I am looking for something that explains both the common Babylonian names as well as the Tana"ch ...
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75 views

What are the months of Jewish civil and religious calendar?

I understand that Jewish religion has two calendars; one is Civil for Kings, childbirth, contracts etc. and second for festivals. what are the months of these calendars and how they are related ...
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152 views

Making up a synagogue calendar manually is tedious work. Which software can do the calculations automatically?

Lots of synagogues print up a customized calendar every year. (Sample.) Such a calendar includes shul-specific information (e.g. service times and maybe a weekly class or two) and general information ...
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37 views

Did Brit with rainbow happen in Kislev?

I read on torahvort.com in their article on Kislev that the Brit with Noach about the rainbow happened in Kislev. We know from the end of Ber 8:27 that Noach left the ark on the 27th of the 2nd month, ...
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What will happen when our set calendar ends?

In a recent conversation I was told that the current Jewish calendar was only set till the year 6,000. There was conjecture as to what will happen after that time (assuming Moshiach has not yet ...
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142 views

Why can we do Tashlich until Hoshana Rabba

One of the reasons to do Tashlich, according to Chabad.org is: "Another reason for saying Tashlich next to a river is because Rosh Hashanah is the day when we coronate G‑d as King of the Universe. ...
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50 views

The connection between Tishrei and Tevet

Can anyone steer me towards resources which explore a connection or relationship between Tishrei and Tevet (I assume, on a mystical level). Both months have a fast day on the 10th day and the full ...
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59 views

If a Beis Din Makes a Mistake When Calculating Kiddush HaChodesh, Does it Count?

On one hand, the Rambam says (in 2:10) Once the court sanctifies the new month, it remains sanctified regardless of whether they erred unwittingly, they were led astray [by false witnesses], or ...
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What is the date ending the 700 years mentioned in these midrashim?

Based on this answer I was able to have some extra fun reading over Shabbat. First, I would like to say, that I was amazed as to how much of the material I was allready familiar with, mostly from ...
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2answers
176 views

Correspondence between 365 negative commandments and days of the year?

There are 365 negative commandments which correspond to the days of the (solar) year (see Makos 23b; Tanchuma Ki Seitzeh 2). Apparently the prohibition of Gid HaNasheh (sciatic nerve) corresponds to ...
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7answers
129 views

Books on the significance of the months in the Jewish calendar

I am looking for books/sefarim (Hebrew or English) that discuss the different months of the Jewish year, and their overall significance in relation to: Zodiac Signs Tribes Chagim Animals ...
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4answers
538 views

Why do we count years from the date of Creation?

Why do we count years from the date of Creation? I intend two sub-questions here, of which the second is far more interesting, so please answer it: Whence did this tradition originate? Why do we ...
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1answer
165 views

Is is prefered to have the Pasach meal on the first or second night?

I remember being told that the Seder can be on either the first or second night. Is this true, and if so, is it prefered for it to take place on one over the other, or are they both equal? Edit: The ...
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1answer
105 views

Is Jewish birthday the same every lunar year

I understand the Jewish birthday is calculated on the lunar year, which could cause the birthday to drift back and fourth along the lunar calendar. But supposing the child was born, say, first day of ...
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2answers
245 views

How do non-literalist Jews interpret the “year zero” in the Hebrew calendar?

As I understand, the Hebrew calendar is counted from the "date of creation". Currently you have the year 5774. In the Christian world there are some creationists who also believe that the world is of ...
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1answer
149 views

Was there a song about the year 5773 being special?

I recall as a kid hearing a tape with some song that went, "in the year tav-shin-ayin-gimel..." [5773], does that ring any bells? What was supposed to be special about that year?
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3answers
74 views

History of 9 Teveis

**Looking for answers as to what happened in Jewish history on this date. It can include both positive and negative occurrences. It can also include birthdays or Yarzheits of well known personalities ...
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1answer
59 views

Page numbers in sefarim

Is there a reason for pages in sefarim being numbered using Arabic numerals (e.g. 1, 2, 3…) in comparison with the Hebrew numeration using letters? What is the earliest source for Arabic numerals ...
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4answers
62 views

Anyone know of an online prayer calendar?

I'm looking for an online calendar that gives daily basic prayer information. This calendar would be geared towards someone who needs to know when the prayers are out of the ordinary, or letting them ...
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1answer
61 views

Why do we abbreviate the Jewish year to the hundreds column?

The current Jewish year is 5774 however it is popularly abbreviated as 774 - תשע״ד. I would like to know why this abbreviation was adopted. I realize that to write out the number 5,000 would require ...
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1answer
74 views

What date was Kibrot Hattaavah?

Are there any sources that give the date for the incident in Kibroth Hattaavah recorded in B'Midbar Chapter 11? I am trying to figure out if it happened on a particular mo'ed or any significant date.
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Birchas Illonos questions

From when until when are you allowed to make the bracha,and what is optimum?
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Rambam Kiddush HaChodesh - Chapter Six - halacha 5

a copy of a few lines from the halacha: Similarly, when the days of a lunar year are counted in groups of seven, according to the weekly cycle, there is a remainder of four days, eight hours, and 876 ...
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1answer
56 views

Why can the 1st day of Pesach never occur on Sunday in 2 consecutive years?

I am doing a lecture on the math of the Jewish calendar. I understand the concepts of the 3 types of year lengths - maleh, chaser and kesidrah - "full", "regular" and "deficient" years. I also ...
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2answers
111 views

How often does chanukah start before v'tain tal?

Outside of Israel, we start saying "v'tain tal oomatar livrachah" ("and provide dew and rain for a blessing") in the amida on the evening of December 4th or 5th (depending on the year). Chanukah ...
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1answer
129 views

What was the first Hebrew date of the first Molad?

If one were to represent the Molad Tohu as a date, comprised of a month, day, year, hours, minutes, seconds, and chalakim, what date would that be?
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1answer
375 views

Virgo Constellation in the Torah [closed]

It is known that Elul is Besulah which in its secular name is Virgo where did this constellation come from according to our Torah sources?
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2answers
147 views

yushkas bris aniversary [closed]

Is it true that new years is the aniversary of yushka's bris
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1answer
34 views

History of 11 Teveis

**Looking for answers as to what happened in Jewish history on this date. It can include both positive and negative occurrences. It can also include birthdays or Yarzheits of well known personalities ...
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1answer
50 views

History of 3 Teveis

New Series **Looking for answers as to what happened in Jewish history on this date. It can include both positive and negative occurrences. It can also include birthdays or Yarzheits of well known ...
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1answer
101 views

Churban Bayis Sheini Not on Tisha B'Av?

I recently heard that the destruction of the 2nd Temple was not actually on Tisha B'av, the date of the destruction of the 1st Temple, but that it was pretty close, so the rabbis had it commemorated ...
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2answers
114 views

Is there proof that we never skipped a day of the week? [duplicate]

Bereshit begins with the first 6 days and the Shabbat. The assumption is then that after that day, Mankind kept track of the day of the week all by themselves until today. Are we sure that no one ...
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2answers
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More info on tzerufei shemos (permutations of G-d's name) vis-a-vis months of the year?

I've seen some siddurim -- I think the Artscroll all-Hebrew Nusach Sefard -- that list one permutation of the name YKVK for each of the twelve months, and that one should have appropriate kavana when ...
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27 views

May the Jewish year be abbreviated in legal documents?

In conjunction with this question I would like to know if the popular abbreviation for the Jewish year 5774 commonly written as תשע״ד may be used in legal documents and if so why.
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34 views

Why are the daily tehilim divided as they are?

How were the daily starting and ending points for weekly and monthly readings of all of tehilim chosen? Are they just chosen to make them all approximately the same length, or are there specific ...
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Not making a wedding on the first 3 days of a month

I've heard there is a custom (practiced in various kehillas, I heard Belz is one of them) to not make a wedding on the first 3 days of a month (meaning alef, beis, or gimmel of a particular month.) ...
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Learn how to keep the feasts of Israel. [duplicate]

In preparation for celebrating my first Passover Seder I purchased a Hagadah and began researching online. I found an article saying there is a 13th lunar month this year because the barley wasn't ...
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0answers
43 views

Mishenichnas Adar marbin b'simcha [duplicate]

The Gemorah says in Taanis 29a משנכנס אדר מרבין בשמחה When Adar comes in one should increase in Simcha (Joy). What does this mean exactly? What should one do to "increase" ("marbin") in ...
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1answer
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Last night *might* have been the first night of the omer. Right? [duplicate]

Possible Duplicate: Sefira Counting in Diaspora How do we count sefira with absolute certainty, as we do, and yet, in diaspora, we have a second seder and a second day of yom tov? Wouldn't ...
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3answers
55 views

History of 5 Teveis

New Series **Looking for answers as to what happened in Jewish history on this date. It can include both positive and negative occurrences. It can also include birthdays or Yarzheits of well known ...
0
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2answers
213 views

Creation of State of Israel and birth of Abraham - 1948

According to the Jewish calendar, Abraham was born on the year 1948. The state of Israel was declared in 1948 according to the secular calendar. Is there any significance to this or is it just ...
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2answers
57 views

History of 10 Teveis

**Looking for answers as to what happened in Jewish history on this date. It can include both positive and negative occurrences. It can also include birthdays or Yarzheits of well known personalities ...
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1answer
42 views

The Book of Numbers and Passover

Why is LORD'S passover (Numbers 28:16) on the fourteenth day of the first month?
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Can one say kaddish for a gentile?

We are inclined to say kaddish on the yahrzeit of a very dear friend who was not Jewish, just as we would for a relative. Is there a reason not to? I am also interested to hear reasons why this is a ...
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2answers
60 views

History of 8 Teveis

**Looking for answers as to what happened in Jewish history on this date. It can include both positive and negative occurrences. It can also include birthdays or Yarzheits of well known personalities ...
0
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1answer
27 views

Why is Rosh Hashana two days in Jerusalem?

Rosh Hashana is the only festival celebrated for two days even in Jerusalem, since there was a possibility that witnesses for the new moon would come in the middle of the day and the Beis Din would ...
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2answers
36 views

History of 15 Teveis

**Looking for answers as to what happened in Jewish history on this date. It can include both positive and negative occurrences. It can also include birthdays or Yarzheits of well known personalities ...