Shabbos and holidays – The Jewish calendar

שבת ומועדים – לוח השנה

The Rebbe on the Jewish calendar — its rules, its halachic questions, and the meaning of its times:

The calendar's rules. On why Rosh Hashanah is postponed from certain days, according to the Rambam and the mystical reasons, see IK 298, 399; on the two days of Rosh Hashanah, IK 9233. On calculating the molad, and setting a wedding on Rosh Chodesh, see IK 8795. On whether Rosh Chodesh is a festival and the status of Tisha B'Av, IK 7030. On astronomy in the Torah, IK 233.

The International Date Line. On counting the Omer and keeping Shavuos and other festivals when crossing the date line, see IK 494, 6298, 6504, 8066.

Times of day. On determining the end of Shabbos, follow the local halachic authorities (IK 7728); on calculating sunset with a local calendar, IK 7760; on the bedtime Shema and Tachanun after midnight, IK 5062; on Selichos customs, IK 3808.

The meaning of the times. Elul, the month of mercy, is the best time for meeting one's children and for preparation (IK 2845, 7735); on setting a wedding date in Elul, IK 1583. The chassidic dates carry their own messages — writing "kesivah vachasimah tovah" for Yud-Tes Kislev (IK 3250), the hint to Yud Shevat in the verse "the tenth shall be holy" (IK 3279). The blessings of the seventh month and the rainy season (IK 8894). A leap year and its Adar Rishon add time to be completed and used (IK 8959, 9284, 9832). On timing the dedication of a Torah scroll, IK 7669; on the Talmudic dispute over when one is judged, IK 114, 300.

See also: Teshuvah – Elul, Rosh Hashanah and the Ten Days of Teshuvah; Shabbos and holidays – The chassidic holidays; Marriage – The wedding: date, customs and expenses.

Shiurim in this topic

1583. Advice on Setting a Wedding Date in Elul and Blessings for Marriage עצה על קביעת מועד חתונה באלול וברכות לנישואין

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2845. Best Time for Meeting with Your Children is in the Month of Mercy, Elul הזמן הטוב ביותר לפגישה עם ילדיך הוא בחדש הרחמים, אלול

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3250. On Writing 'Kesiva vechasima tova' for Yud Tes Kislev על כתיבת כוח"ט לי"ט כסלו

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3279. The hint for Yud Shevat from the verse 'Shavet Ha'asiri yiheyeh kodesh l'Hashem' הרמז לי' שבט מהפסוק שבט העשירי יהיה קודש לה'

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3808. Halachic Clarifications on Selichos Customs and Related Practices הבהרות הלכתיות על מנהגי סליחות ומנהגים נלווים

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5062. Avrech Shimon's Question on Bedtime Shema and Tachanun After Midnight שאלת האברך שמעון על קריאת שמע שעל המטה ותחנון לאחר חצות