Questions tagged [molad]

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Is it inappropriate to announce the upcoming molad prior to Shabbat?

Our shul (like many others) has a weekly e-mail newsletter that goes out before Shabbat containing candlelighting times, davening times, etc., as well as information on simchas and upcoming community ...
mweiss's user avatar
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1 vote
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Four Gates - ארבעה שערים

The Tur OH 428 describes a system for finding the year's calendar based only on (a) the molad of this year's Tishrei, and (b) knowing which of last year, this year, and next year are regular or leap ...
MichoelR's user avatar
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Is there a Hebrew Calendar discussion place? [closed]

Well, is there? I mean a Torah-observant place, if possible, where they discuss the math and the system behind the current calendar, original sources, perhaps the history involved in it as well (the ...
MichoelR's user avatar
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4 votes
1 answer
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Is the TorahCalc Molad Calculator accurate?

I have been making an excel spreadsheet that calculates molads. I started from the Molad for Tishrei in Year 1 Anno Mundi. Based on various websites (including TorahCalc), the Molad was on Tuesday at ...
Joshua Pearl's user avatar
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Has there been any scientific study that agrees with Talmud Rosh Hashanna 20b's time difference?

I'm extracting from this M.Y. question: In Talmud Bavli Rosh Hashanna 20b, R' Zeira quotes R' Nachman as saying: כ"ד שעי מכסי סיהרא לדידן שית מעתיקא ותמני סרי מחדתא לדידהו שית מחדתא ותמני ...
DanF's user avatar
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8 votes
2 answers
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Are there any sages who have written about experiencing a total solar eclipse?

This year, on August 21, 2017, many Americans will have a chance to experience a total solar eclipse. Total solar eclipses were rarely documented before the 10th century of the Common Era. But, I ...
Bruce James's user avatar
6 votes
1 answer
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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: 4)...
DanF's user avatar
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4 votes
2 answers
531 views

I am looking for an algorithm to calculate Molad Tishrei for any given year

I am using MS Excel together with VBA (Visual Basic for applications) to write macros to calculate Molad Tishrei. I have located information in various web sites that explain how to calculate Molad ...
DanF's user avatar
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