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12th Cycle Dedication

ERCHIN 6-9 - Two weeks of study material have been dedicated by Mrs. Estanne Abraham Fawer to honor the twelfth Yahrzeit of her father, Rav Mordechai ben Eliezer Zvi (Rabbi Morton Weiner) Z'L, who passed away on 18 Teves 5760. May the merit of supporting and advancing Dafyomi study -- which was so important to him -- during the weeks of his Yahrzeit serve as an Iluy for his Neshamah.


1. The Gemara explains why the Chachamim did not want to make nine leap months in one year.
2. The Chachamim were not concerned if the new moon for Rosh Hashanah would appear one day before Rosh Hashanah.
3. There is a dispute about how many days are in an extra month, such as Adar Beis, in a leap year.
4. Shmuel and Rav Huna: A lunar year is not less than 352 days, and not more than 356 days.
5. If a person says that he will be a Nazir for the length of a solar year, he remains a Nazir for 365 days.


1. If they would have done so, the new moon for the next Rosh Hashanah could appear three days before Rosh Hashanah. People would start to complain and spread rumors that the Chachamim do as they please with reference to the arrangement of the calendar.
2. People will not complain and spread rumors if the new moon is seen only one day earlier.
3. Tana Kama: There are 30 days. Raban Shimon ben Gamliel: There are either 30 or 29 days.
4. For example, if there are eight leap months, the lunar year will be 356 days. If there are only four leap months, the lunar year will be 352 days.
5. If he says that he will be a Nazir for the length of a lunar year, he is a Nazir for 354 days. This amount is based on the length of a normal lunar year, which is what people have in mind when they make a pledge.

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