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 ...
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: ...
As I understand it, the origin for having a 2nd day of Rosh Hodesh & Yom Tov is that messengers were only able to travel a certain distance from where the Sanhedrin was to convey the declaration ...
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?
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 ...
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?
Rashi says that ובשנת ארבעים שנה עשו ולמחר עמדו כולן חיים וכיון שראו כך תמהו ואמרו שמא טעינו בחשבון החדש חזרו ושכבו בקבריהן בלילות עד ליל חמשה עשר וכיון שראו שנתמלאה הלבנה בט"ו ולא מת אחד מהם ...
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 ...