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

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Why did Hashem create the world in such a way that a leap year is needed?

I understand why we have a leap year; to keep the sun and moon cycles in sync, so that Pessach is always in the spring. That's all technical, as a result of the moon orbiting too slowly - or the sun ...
6
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1answer
335 views

Who divided the Tehillim into days?

Who divided the Sefer Tehillim into daily sections (both day of week and day of month)?
6
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1answer
136 views

When is “vesain tal umotor” said in Australia?

When is "vesain tal umotor" said in the Southern Hemisphere eg Australia?
6
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2answers
178 views

Walled cities for Purim other than Jerusalem

The holiday of Purim is unique in that some locations celebrate it on different days. The rule is: if the city was walled at the time of Joshua's conquest of the Land of Israel then they celebrate on ...
6
votes
1answer
119 views

Why don't islands read the m'gila two days?

Bavli, M'gila 5 amud 2, cites a doubt as to when the m'gila is read in T'verya: on the fourteenth of Adar, as in most places, or on the fifteenth, as in a city walled since the time of Y'hoshua. The ...
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97 views

“לְחֹדֶשׁ שְׁנֵים עָשָׂר” in al hanisim on purim this year

As I was reading Al Hanisim this year, something odd struck me "לְחֹדֶשׁ שְׁנֵים עָשָׂר" - the 12th month. What struck me was that this year is a leap year so we actually celebrated Purim in the ...
6
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0answers
58 views

Historical Calendar Records

Are there any records of the Beis Din's decisions regarding the Hebrew Calendar (e.g. to add months, how long the month would be), before Hillel Hakatan established the fixed calendar?
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4answers
181 views

Jewish Leap Year

Why when we add an additional month to the year do we only add it in Adar? Why not have a second Chesvon or a second Shevat, etc.?
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4answers
462 views

Cheshvan or MarCheshvan?

The month of Cheshvan is called by many MarCheshvan. Are both correct or which one is more correct?
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6answers
384 views

Gematrias or Roshei Taivos for the year 5772

Looking for Gematrios of phrases and/or Roshei Teivos that are appropiate for the year 5772 (by adding up to either 5772 or 772, which is the accepted numerical abbreviation for the year after ...
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3answers
107 views

Fast of the Tenth of the month of Teves

What is the significance of the Fast of the Tenth of Teves?
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3answers
880 views

Google says it is the Jewish Year 5774. The wiki says Judaism is 3000 years old. How is this discrepancy reconciled?

Google says it is the Jewish Year 5774. The wiki and other sources say Judaism is 3000 years old and suggest Abraham was born 4000 years ago. Where is the discrepancy? I am perhaps looking for an ...
5
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1answer
219 views

A cryptic Seder HaDoros regarding to the year of Jesus' birth

Regarding the year of Jesus' birth, it says in Seder HaDoros (Year 3724) that the year 3724 and the year (3)532 are really the same. What in the world does he mean? Its in the first column first ...
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2answers
713 views

If Yom Kippur hypothetically fell on Sunday, would you make havdalah?

I was curious about this hypothetical situation. If Yom Kippur would fall on Sunday, Motzei Shabbat, so immediately when Shabbat ends, Yom Kippur starts. Would there be some sort of separation, בין ...
5
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1answer
69 views

When was the last time when we had 4 consecutive leap years when Matot and Masei were read separately?

I noticed that the only times that parshat Matot and Mas'ei are read separately outside Israel is during a leap year when the first day of the previous Rosh Hashannah occurred on Thursday. This would ...
5
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2answers
122 views

Number of Yamim Tovim that fall on Shabbos

In a given year, a certain number of Yamim Tovim days fall on Shabbos, and a certain number not. What are the minimum and maximum count of Yamim Tovim days that can fall on Shabbos in a single year ...
5
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1answer
260 views

Rambam's method for calculating the conjunction of the moon (and sun)

I think I'm missing something basic here... The Rambam, in Hilchot Kiddush Hachodesh (6:3) says that the interval between one conjunction to the next is is 29 full days, 12 hours of the 30th day, and ...
5
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1answer
146 views

When do we change back the ark-cover etc from white to the rest-of-the-year colour?

When do we change back the proches (ark-cover) etc from white to the rest-of-the-year colour? I would have thought right after Simchas Torah or possibly Isru Chag?
5
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2answers
448 views

Meaning of the name Sivan

I recently met a young lady with the name of Sivan. She did not know the meaning of it, other than it is a name of a month. I was wondering if there is a meaning to this name and what it is?
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1answer
114 views

why 3 of punishment, 7 of consolation, 2 of repentance

As is well known (e.g. from Tosafos to M'gila 31:2 or from Shulchan Aruch Orach Chayim 428:8), we have three haftaros of punishment, followed by seven of consolation and then two of return ...
5
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1answer
251 views

Twelve Months of Mourning During a Leap Year

For those who are mourning a parent for the requisite twelve-month aveilus, would Adar 1 and Adar 2 count as two separate months towards the twelve? Or does one year mean a full year, i.e., from ...
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1answer
112 views

Why is Vayelech read twice in a year?

It is mechanically possible, like this year, that parshas Vayelech is actually read twice in one year - last year it was after Rosh haShanah on Shabbos Shuvah, and this year - together with Nitzavim, ...
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1answer
65 views

Why did people date divorce documents according to the Greeks?

According to this article on Jewish Encyclopedia, the conventional Jewish system of dating documents in the Middle Ages (a system called "מנין שטרות") was related to the accession of Seleucus I, the ...
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1answer
83 views

Aharon's and Miriam's Yahrtzeit

The Book of Numbers spans almost the entire 40 year period in the desert, documenting numerous events that occurred to the Jews as they wandered. I count only 5 dates mentioned in the text (listed in ...
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1answer
154 views

Some years have a siman, what does it mean?

I saw on a calendar that each year has a siman, for example 5772 has the siman 517. Here are the simanim for the next few years: 5773: 203 5774: 1523 5775: 517 5776: 1217 Does anyone know ...
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1answer
124 views

Why announce Mashiv Haruach and not Vtein Tal?

When we start saying mashiv haruach there is an important requirement of announcing the liturgical change. If one does not hear the announcement, one does not say mashiv until the community would have ...
5
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2answers
125 views

Why do Israelis keep one day of Yom Tov?

From what I understand, we outside of Eretz Yisrael we keep two days of Yom Tov as a continuation of the minhag that evolved from the time of the Bais Hamikdash when we would not necessarily know when ...
5
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0answers
106 views

What is a ger's birthday in terms of Jewish astrology? conversion date or birth date?

In terms of Jewish astrological signs and influences on people, per Kabbalah, would a ger use their actual 'birth' date or their date of conversion which is considered a rebirth?
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0answers
133 views

Late sunset times and Jewish observance

This question is distinct from other questions which ask how and when to begin Shabbat, etc. when there is no sunset. I am asking about places in which sunset occurs very late during certain times of ...
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1answer
280 views

First year counted from creation [duplicate]

What is the first year for which there exists a record of it being dated according to the currently used system that starts counting from creation?
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3answers
233 views

Why is the day of Rosh Chodesh announced before every month except Tishrei?

Why is Tishrei the only month not included in the custom of announcing the day(s) of Rosh Chodesh on the Shabbos before the month begins?
4
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1answer
272 views

When was the last time the “Leap Year” postponement rule was used to delay the date of Rosh Hashannah?

This site explains that there are 4 rules that would cause Rosh Hashannah to be postponed 1 or 2 days after the date of Molad Tishrei. You can view all 4 rules on the web site, but rule 4 states: ...
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1answer
76 views

Why do the Ashkenazim say Selichos for a minimum of 4 days before Rosh HaShana?

The Ashkenazim start saying Selichos a minimum of 4 days before Rosh HaShana? What is the reason of a minimum of 4 days?
4
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1answer
121 views

6 chapters of Avos in 7 weeks

Some study pirke Avos weekly through the summer, from Pesach to Rosh Hashana. Others do so only for the six Shabasos between Pesach and Shavuos, one chapter a week. I've heard the latter custom ...
4
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2answers
69 views

Mattanos Levyonim via Jerusalem organazations

Am I yotzeh if I (a non-Jerusalemite) give it to an organization in Jerusalem who gives it out on their Purim since a mitzvas Hayom on my purim?
4
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2answers
278 views

Halachically skipping Purim

There have long been 'legends' of various liberal figures in Judaism, including Yeshayahu Leibovitz (brother of Nechama Leibovitz) that would 'skip' Purim. On the 14th of Adar they would be sure to be ...
4
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1answer
2k views

How long does one say Kaddish for a parent?

For example, if one's parent died on 1 Nissan, and was buried on 2 Nissan, what is the last day on which kaddish would be said for them?
4
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1answer
145 views

Why is Shavuos all alone?

Why is it that, out of the 16 days of non-High Holiday biblical festivals (7 days of Pesach + 1 day of Shavuos + 7 days of Sukkos + 1 day of Shemini Atzeres), only the single day of Shavuos is without ...
4
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1answer
34 views

Southern Birkas Ha'ilanos

I've seen Saying Mashiv HaRuach in the Southern Hemisphere. Similarly, is Birkas Ha'ilanos (ברכת האילנות) said in Tishrei in the southern hemisphere? That's when the trees bloom.
4
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1answer
278 views

When is Musaf said?

When is the Musaf said? I know it is part of the Shacharit service. I mean when as in what holidays, fast days, etc... Would you say it on Tisha B'av for example. If not, why? At the end of ...
4
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1answer
65 views

Counting years according to the solar calendar

I once heard there is an opinion in Rishonim (maybe Gaonim?) that says we count ones years of life according to the solar calender. So for example a boy would become bar mitzvah when he would turn 13 ...
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1answer
74 views

Ulchaparat pasha in Chazarat haShatz

When "ulchaparat pasha" is said in the Chazarat haShatz of Rosh Chodesh, how should the amein of the tzibbur be handled? Should the amein from "velislichat avon" be deferred until after "pasha," or ...
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2answers
179 views

Shouldn't the flood have ended on the 18th of Cheshvan?

Inspired by this question: New date at sunset: question on Sifse Chachamim The Torah tells us that the Flood started the 17th of Cheshvan (Bereshit 7:11) and concluded the 27th of Cheshvan (Bereshit ...
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1answer
611 views

Mashiv HaRuach - V'Sain (veten) Tal Umatar

Why do we start saying Mashiv HaRuach on Shemini Atzeres yet we do not say V'Sain Tal Umatar until Dec 4 / Dec 5 (In Chutz L'Aretz)? Why should they not be on the same day when they are similar ...
4
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1answer
124 views

What is the proper way to write the year when it is a year that ends in מנצפך?

When the year ends with one of the letters of מנצפך - for example 5780 - What is the correct way to write it תש"פ or תש"ף?
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2answers
106 views

Why do we do anything for Pesach Sheini?

According to my handy Luach, on Pesach Sheini, some people omit tachanun (I haven't looked into any source texts to see who does) and according to the Wikipedia page, some eat matzah but I'm wondering ...
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1answer
85 views

Why do Cheshvan and Kislev vary in length?

In general, Jewish-calendar months alternate in length: odd-numbered months have thirty days each and even-numbered months have twenty-nine. However, it is sometimes necessary for a year to have one ...
4
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2answers
98 views

Why be happy Shushan Purim?

Rama (695:2) quotes from the Maharil (though I don't see it there): וחייב במשתה ושמחה קצת בב׳ ימים י״ד וט״ו and one must have a drinking party and joy, a little, on two days: the fourteenth and ...
4
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1answer
368 views

When and why did we start reading the Parshat Hashavua?

My question is twofold: When did we start reading a new parsha (torah portion) every week? Why did we start reading a new parsha (torah portion) every week?
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1answer
103 views

Time Parameters of Mishenichnas Adar Marbin B'Simcha

Is "Mishenichnas Adar Marbin B'Simcha" just for the month of Adar, and then you take a step down in simcha for Nisan? Or are you supposed to raise your level of simcha and stay there until Av, when ...