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

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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
99 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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2answers
78 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?
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1answer
92 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 ...
4
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1answer
47 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.
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1answer
316 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 ...
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1answer
74 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
91 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
197 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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2answers
121 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
747 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
136 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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1answer
82 views

Parshas Zachor before Purim?

Prior to the story of Purim was there a special yearly reading of Parshas Zachor? At which point in history was it instituted to read Parshas Zachor before Purim?
4
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2answers
146 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
95 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 ...
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1answer
193 views

An improved Jewish calendar after this one expires?

Conventional wisdom has it that about 1600 years ago, the latter Hillel utilized his Sanhedrin to sanctify the Hebrew calendar as we know it today until the year 6000. (Presumably by that point we'll ...
4
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1answer
509 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
217 views

Tuesday and Friday nights

Bavli P'sachim 112:2 has a story of an angel of destruction who would work daily (see Rashash) until asked to quit. When she requested some time to work, the rabbi she was talking with allowed her ...
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3answers
177 views

Is it ok to celebrate New Years Eve?

Is it ok to celebrate New Years Eve? Which (orthodox, not modox or non-orthodox) rabbinical authority was against it and which one was in favor of it (if such opinions exist).
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1answer
261 views

What are the 14 types of Jewish Years?

As a way of explanation, I'm working on Objective-C code that calculates parashat hashavua. Initially, I ported the Javascript offered by YYDL as an answer to this question. I've found that my port ...
4
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2answers
172 views

Reasoning for doing/not doing mourning customs in second half of the omer

In my observation, most people observe certain mourning customs between the beginning of sefirat ha'omer and lag b'omer (such as refraining from shaving, listening to live music, etc.). Some people ...
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1answer
59 views

Why begin selichot on a Sunday rather than on a date?

We ashkenaz start selichot on a Sunday. Sunday is a day of the week. Usually we start events on a given day of a given month (e.g., rosh hodesh, rosh hashanna), or after a given number of days (e.g.,...
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2answers
166 views

Why not say tachanun until 2 Cheshvan?

It's recorded in most siddurim I've used that some people have the custom to skip tachanun on Isru Chag (the day after Sukkos), and start again the day after, while others don't resume saying it until ...
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1answer
54 views

How accurate is the Molad?

To the best of my knowledge the Molad is every 29.5 days + 793 Chalakim. Is there any information showing if the current Molad calculation is accurate scientifically? If it is off by how much is it ...
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0answers
62 views

What if two communities had two different Shabbat days?

Imagine this: One community, A, keeps Shabbat on what we identify as Saturday. However, another community, B, for whatever reason, actually keeps Shabbat on what we identify as Sunday. These two ...
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0answers
52 views

Yakkov living in Egypt 17 years - connection to 210 years of servitude

Parshas Vayechi starts off that Yaakov lived in Egypt for 17 years. I was thinking that 17 years x 12 months = 204 months. Usually in 17 years there are 6 leap years which would increase the total ...
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2answers
364 views

Why do we say Yizkor when we say it?

In the diaspora, we say Yizkor on: The last day of Passover The second day of Shavuot Yom Kippur The first day of Shemini Atzeret Why do we always say Yizkor on these days in particular? If it's ...
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6answers
417 views

When Adar Begins we increase our Joy-משנכנס אדר מרבים בשמחה

משנכנס אדר מרבים בשמחה- When Adar Begins we increase our Joy (I know it is not in Shulchan Aruch or the Rambam) What is the practical application of it?
3
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3answers
387 views

Moshe Rabeinu's Yarzheit

It is common knowledge that Moshe Rabeinu was Niftar on 7 Adar. Was it a plain year with 1 Adar or a leap year with 2 Adars? If it was a leap year on what Adar was he Niftar?
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2answers
329 views

Calculating Tekufas Teves

Although often associated with the Winter Solstice, Tekufas Teves is an independent date. How is Tekufas Teves, or the other Tekufos (?) determined?
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4answers
144 views

Significance of 2 Teveis in Judaism

Is the 2nd day of the Month of Teveis significant in Judaism? Looking for answers as to what characteristics (historical, numerological or otherwise) that is commemorated by or significant to Judaism ...
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2answers
285 views

Looking for a Niddah Calendar calculator

I am looking for a program that calculates the different significant dates for hilchos Niddah based on the information you give it. My criteria are as follows: Must be free Must be PC compatible (i....
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1answer
76 views

Splitting the Double Parshiyot

As far as I can remember, during the course of the year there are eight sets of parshiyot that are sometimes joined together: תרומה תצווה ויקהל פקודי תזריע מצורע אחרי מות קדושים בהר בחקותי חוקת בלק ...
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4answers
1k views

Where can I find a chart of the Mishna Yomit (daily Mishna learning)?

Where can I find a chart of the Mishna Yomit (daily Mishna learning) - either online or offline?
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1answer
115 views

Minimum number of days in the first week of the Hebrew calendar?

Does the first week of Nissan have a minimum number of days? Or does it range from 1-7? If it does have a minimum (greater than 1 ..obviously), why?
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1answer
121 views

Selichos start: Ashkinazim vs. Sefardim

Why do Sefardim start saying Sleichos earlier than Ashkinazim?
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1answer
290 views

“B'shem Hashem” for 11 Tishre

Some call the eleventh of Tishre "b'shem Hashem" ("בשם ה׳"). (I assume this is a hasidic term, since, according to what I've heard, the name comes from the Baal Shem Tov.) Why is it called that?
3
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2answers
120 views

Donating to the poor ON Purim

In minyan this morning, the gabbai said that money given to the shul as matanot l'evyonim would be donated to a charity which will "distribute it to evyonim in Yerushalayim, on Purim." I live in the ...
3
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2answers
424 views

Hebrew Calender API/Library in PHP or Javascript to add days, month or years to Julian date

I have a web project where I need a function either server-side using php or client-side using javascript where I can pass in a Georgian date and have month(s) or years added to it according to the ...
3
votes
1answer
119 views

Altering the Spelling out the Hebrew Year

In 1983-1984, the Hebrew year was 5744. Normally, the year would have been spelled out in Hebrew letters תשמ״ד, but according to my rabbi then, Rabbi Phillip Rabinowitz, zt'l, as pronounced the word ...
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1answer
343 views

New Moon Based on Sighting Outside of the Land of Israel

I would appreciate someone directing me to a source that states/indicates/suggests whether the visibility of the new moon outside the Land of Israel may be used to begin the Jewish month in that ...
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2answers
159 views

In which month is it impossible to become Bas Mitzva? [closed]

In which month is it impossible to become Bas Mitzva?
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2answers
65 views

Why isn't Shabat haGadol held on the 10th of Nissan?

Why is Shabat haGadol celebrated based on day of the week (Shabat) and not day of the month, if it happened on the 10th of Nissan? Most other days of commemoration in Judaism are celebrated by a day ...
3
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1answer
79 views

When did the original names of the months change?

The Haftorah this past week mentions the second month using the name Ziv. The orignal names of the months are discussed here: First-Temple-Era names of the Hebrew months? When did the original names ...
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1answer
190 views

Splitting Sefira Mourning Practices According to Rav Moshe Feinstein

People hold of the restrictions of the seven-week omer period (shaving and listening to music, for example) at various times: some hold approximately the first five weeks; others, approximately the ...
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1answer
75 views

How can Australia celebrate Pesach at the same time of year as other countries?

The Torah commands that we celebrate Pesach in the spring time so how can Australia celebrate Pesach at the same time of year as other countries? While I suspect the answer is that they celebrate at ...
3
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1answer
167 views

Where is the source for assigning a pasuk to each year since creation?

I remember having been told that there are those who assign each of the 5845 pesukim in the Torah to each year since creation. This is from memory as I have not found the reference yet. Would anyone ...
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2answers
97 views

Why isn't Hallel recited on VE Day?

There is a good deal of controversy about reciting Hallel on days not ordained by ancient tradition. But there are at least some opinions that Hallel should be recited to commemorate dates of ...
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2answers
109 views

Haftarah for yahrtzeit

If one's yahrtzeit falls on a day when there is a haftarah, there is a discussion about whether it's a bigger merit for the deceased to recite the haftarah on that day or before the day of the ...
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0answers
154 views

What is the significance of a Blood Moon in Judaism?

Is it true that the appearance of a Blood Moon is an omen in Judaism? And why it happens to be coinciding every time with a Jewish holiday since quite a while? I would like to know about the facts and ...