Questions tagged [calendar]

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

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3
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1answer
93 views

Longest interval between readings of haftarah for Shabbat Rosh Chodesh

When Rosh Chodesh falls on Shabbat, a special haftarah (Isaiah 66) is read. However, in our fixed calendar certain months can never have Rosh Chodesh fall on Shabbat (Kislev, Sivan). For certain other ...
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2answers
216 views

Which event is more infrequent?

This year, we have a couple of infrequent events, and I'm trying to figure out which is less frequent, considering a 19 year cycle (which, I think, is the best time unit to use). Some of the data ...
6
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1answer
264 views

All explicit dates in Tanakh

What are all the dates mentioned in Tanakh? This question seeks all dates that are explicitly mentioned in the verses. No chronological extrapolation or exposition allowed here. The date could be ...
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2answers
61 views

Looking for the source that connects the days of the week to the sefirot

I found a picture of it, but I absolutely cannot find the title. I remember reading about certain months correlating to din, some rachamim, the rest judgment is pending. So, I'm hoping this book has ...
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1answer
64 views

What is my Zodiac sign? [closed]

I was born on the 25 of Tishrei 1981 at approx. 5:30 PM. According to most secular astrologers I am considered to be a Libra/Scorpio cusp sun sign (Oct. 19-25). Tishrei is considered the month of ...
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4answers
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Why is Rosh Chodesh sometimes TWO days?

Why for certain months of the year do we celebrate the festival of Rosh Chodesh for two days while on other Roshei Chadashim we have one day of Rosh Chodesh?
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2answers
698 views

Idolatrous origin of the name TAMMUZ

The Gemmorah in Jerusalem Rosh Hashana 6a explains the process of adopting the Babylonian names on Months instead of Biblical ones. דא"ר חנינה שמות חדשים עלו בידם מבבל R'Hanina said: the names ...
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2answers
228 views

How and why does a Jubilee year cause Rosh Hashanah to take place on the 10th day of the month?

How and why does a Jubilee year cause Rosh Hashanah to take place on the 10th day of the month? Ezekiel 40:1 reads "on Rosh Hashanah, on the tenth of the month". Rashi asks and answers, &...
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1answer
88 views

How does one write Hebrew dates in short?

I'm trying to write down some of my friends' Hebrew birthdates, and because there's a bunch of them, I'm doing it in short. So 8 Tishrei 5763 would convert to 1/8/63 or ח׳ א׳ תשס״ג. (I think; I'm not ...
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2answers
274 views

S'feika D'yoma in Niddah

There are several types of vestos (patterns in menstrual cycles) that a woman is able to aquire. One such vesses is the vesses hachodesh, which relies on the day of the (Jewish) month. So for instance,...
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2answers
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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
138 views

Jewish calendar and the measured time of a year

I'm aware that the Hebrew calendar is lunar based, normally consisting of 12 lunar months and 354.37 days. I'm aware that, to keep the 3 festivals in sync with the seasons, an extra month is added ...
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3answers
664 views

Is it ok to celebrate New Year's Eve?

Is it ok to celebrate New Year's 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
196 views

Is a secular New Year tree considered OK?

This question presupposes that celebrating secular New Year's Eve in the first place is OK. I looked here: " Is it ok to celebrate New Years Eve? " and the answers seemed not fully resolved, ...
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1answer
985 views

Date of the Akeida?

Are there sources in our tradition which discuss the Hebrew date of Akeidas Yitzchak? The fact that we read the Akeida on Rosh Hashana or, properly, every day suggests to me that the "real" date is ...
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3answers
485 views

First-Temple-Era names of the Hebrew months?

The Chumash refers to the months simply as "the first", "the second", and so on. Today we know them by their Babylonian names (Nisan, Iyar ...) Occasionally the Prophets from the First-Temple Era use ...
2
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1answer
107 views

Is there any research available for the original 'Hebrew' 3rd & 5th month names?

I'm looking at a question that was posted here 7 years ago about the original name of the months. First-Temple-Era names of the Hebrew months? There is mention of a possible month called, "Tzach."...
2
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1answer
109 views

Why were Mishmarot a concern in the Qumran calendar?

I'm researching various sources regarding the Qumran calendar. I don't understand why there was a concern for incorporating the 24 priestly "watches" (mishmarot) (Refer to I Chronicles 4 for ...
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1answer
70 views

Zodiac of Adar I

The zodiac sign of the month Adar in a non-leap year is Pisces (Dagim). But what kind of Adar I, which is in a leap year? Two months cannot have the same zodiac sign.
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1answer
52 views

When did the Cutheans undermine the lighting of signal fires to announce the new moon?

Back when the months of the Jewish calendar were determined by observations of the new crescent moon, eyewitnesses would bring their testimony to the rabbinical court in Jerusalem, and the court would ...
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2answers
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Climate and growing season in Iron Age Israel and Judah [closed]

Jan A Wagenaar, Origin and Transformation of the Ancient Israelite Festival Calendar, Harrassowitz Verlag, Wiesbaden 2005, proposes that the Feast of Unleavened Bread was originally in the month of ...
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4answers
265 views

Gezer Calendar and Lunar calendar

Do the paleo-Hebrew inscriptions of the Gezer calendar, dated around the 10th century BCE, suggest that at one time the ancient Israelites used a strictly lunar calendar? The calendar is written ...
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3answers
171 views

Could the Hebrew calendar calculations have been know since the time of Moses?

Many years ago, I read (non-Jewish source, without explicit external references) that the calendar calculations have actually been in effect since Moses, but were kept in secret for many centuries. ...
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2answers
657 views

When does a day start/end in the far North/South?

As I understand it, a day in the Jewish calendar is from sunset to sunset. How is this handled if you are living so far north or south that you have long periods of daylight or darkness?
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364 views

What is the Sod HaIbbur and what is so secret about it?

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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4answers
2k views

Why use Babylonian calendar instead of our own?

Why did the Hebrews not create their own calendar system instead of copying the pagan Babylonians'? I find it interesting that they use a pagan calendar which often honours pagan gods. Why is this ...
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3answers
154 views

Calendar Rules before Hillel HaSheini

In today's calendar (that is, the one established in 4119 by Hillel the Amora), months alternate between 30 days and 29 days, generally speaking. However, because of the "Arba Dechiyos" (lo adu Rosh, ...
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2answers
1k views

Must the first day of Nisan follow spring equinox

Looking for clarification on how ancient timekeepers set the day of Passover. I understand that it would begin on the 14th of first month of new year. I’m not clear if the new moon that starts the ...
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262 views

What is the relation between the month Nisan and the spring equinox?

I'm searching for the relation between Nisan and the spring equinox according to Scripture. I know of the texts Genesis 1:14, Exodus 12:2-3, Leviticus 23:15 and Deuteronomy 16:1. I find multiple ...
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5answers
4k 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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3answers
347 views

What parsha is the most commonly read parsha?

Which Parsha has the most Kriyos Hatorah from it?
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47 views

Is there somewhere I can find a list of just Rosh Chodesh for the year in Gregorian with one and two-day RC?

It would be convenient if I could find a list of RC for the year, such as 5781 2020/2021: Rosh Chodesh Sh'vat 1/14 Th Rosh Chodesh Adar 2/12-13 F S ... But this is what I've found: https://...
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1answer
103 views

Date/Week of Creation off by a day?

Question: If we believe that Sunday is Yom Rishon of Creation, then what do we do with the given date of Creation being Monday, October 7, 3761 B.C.E. according to our current calendar? Are there ...
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1answer
88 views

Sources for Rav Saddia Goan on set days for Pesach

Rashi in Pesachim 58b mentions and rejects an opinion that in the days of the Tannaim the rules for which day of the week Pesach and (Rosh Hashana) can fall out, לא בד"ו פסח, were already in ...
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Finding the daf for a day in history [duplicate]

Is there any online app (or simple process of calculation) that can indicate which daf was studied for any calendar day in Daf Yomi history?
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3answers
767 views

How can I identify which dates Jewish holidays/special days fall on?

Not being Jewish I scheduled an event this year, only to learn shortly before it occurred that the date was a Jewish Holiday and so I had essentially excluded Jews. I live in the United States, and ...
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2answers
70 views

Importance of "Days" in the process of Creation

Why is it important that the Creation process is divided into 6 "days", as opposed to "parts" or "stages" or even presented in simple succession without mentioning "units"?
2
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1answer
112 views

Is there any (relatively) simple way to calculate when/how often the Daf Yomi cycle will finish a tractate on Erev Pesach?

Shulchan Aruch O.C. 470:1 codifies that firstborns fast on Erev Pesach. In my experience, the widespread practice is for firstborns to attend a siyum of the completion of a tractate of Talmud, usually ...
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1answer
83 views

What is the original source for Yahrtzeit customs?

There are various customs and even halachot associated with yahrtzeits, such as saying kaddish, getting called to Torah, lighting candles, fasting, serving as a prayer leader, giving charity, ...
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2answers
144 views

Known birthdays

In the season of my birthday, I was wondering: Which figures, from Tanach and Sha"s, do we know the exact birthday of? I am aware of Moshe's birthday being identified as the 7th of Adar. Which other ...
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3answers
8k views

Does Passover occur on the first full moon after the equinox?

Christians claim that Jesus was put to death on Passover eve Nisan 14 they make the date for easter based on the first full moon after the spring equinox(paschal full moon) This year (2016) Passover ...
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2answers
622 views

Why does the date for the prayer for rain change from one century to the next?

My due diligence: Praying for rain in the Diaspora How to calculate 60 days from tekufat tishri for any given year? On which evening should we start saying “V'tein tal u'matar li'vrachah”? I see ...
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2answers
73 views

The New Year in Tishrei?

Why does this Gregorian to Hebrew calendar converter show Elul 29 as the first day of the new Jewish year? I have not ticked the "After Sunset" box. It converts September 8, 2018, to Elul 28,...
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0answers
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Why aren't the two days of Rosh Hashannah structured as every other Rosh Hodesh? [duplicate]

I don't recall the exact location Rambam's Mishneh Torah, but he discusses that during the time of Sanhedrin, if witnesses came before sundown of the 30th day, then that day was considered Rosh Hodesh,...
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1answer
499 views

What is the א"ת ב"ש ג"ר calendar mnemonic?

The Gemara Arakhin 9b discusses certain rules of the calendar. Specifically, it mentions that Rosh Hashana will always be on the same day of the week as the day of the Omer (the 2nd day of Pesach), or ...
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1answer
75 views

Confuse about the date

From this website, I get: 14th of Nisan, 3793 = Fri, 1 April 0033 To make easier, assumed that the sunset is always exactly on 6.00 pm. So, 14th of Nisan duration is from 6.01 pm to 6.00 pm and 1 ...
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0answers
40 views

Apparent contradiction if Elul was made full when necessary

The Gemara Rosh Hashanah 19b says: והאמר רבי חיננא בר כהנא א"ר מימות עזרא ואילך לא מצינו אלול מעובר לא מצינו דלא איצטריך הא איצטריך מעברינן ליה Didn’t Rabbi Chinana bar Kahana say that Rav said: ...
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2answers
135 views

Is there a book or online source explaining Jewish year-"type" sequences?

The current Judaic calendar allows for three types of year lengths: Chaser ("missing") - 353 days Kesidra ("in order") - 354 days Shalem ("full") - 355 days (Add 30 to each of the above for leap ...
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2answers
274 views

How to determine Sabbath day in the Jewish calendar?

I'm trying hard to understand it by reading the internet, but still I fail to elaborate what is in my mind as I am still unable to understand it. First, I would like to propose the things I know about ...
3
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1answer
103 views

Has Elul Been Made Full Since the Time of Ezra?

In the Gemara in Rosh Hashanah (19b) it says: והאמר רבי חיננא בר כהנא א"ר מימות עזרא ואילך לא מצינו אלול מעובר לא מצינו דלא איצטריך הא איצטריך מעברינן ליה Didn’t Rabbi Chinnana bar Kahana say ...

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