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  1. Home
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  6. Kiddush Hachodesh and the Jewish Calendar

Kiddush Hachodesh and the Jewish Calendar

15 Articles

8. The dispute of Rav Sadya Gaon [Rasag] and Rebbe Ahron Ben Meir of Eretz Yisrael

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  • 1264

Calculating the new moon and creating a calendar of months

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From the Rav’s Desk: Were Shluchim sent in Chodesh Sivan to inform others as to when the new moon was sanctified?

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Hashem showed Moshe the new moon

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One versus two days of Rosh Chodesh

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The Biblical command

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The names of the Jewish months

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The names of the month

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The order of months that are Malei/Chaseir and the months of Cheshvan/Kisleiv

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The process of determining Rosh Chodesh in times of the Sanhedrin

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Understanding Kiddush Hachodesh and the Jewish Calendar-Part 1

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Understanding the moon’s cycle

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When did we stop sanctifying the new moon based on testimony and will we continue in the future

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  • 626

When is Rosh Chodesh?

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Why the Jewish people are compared to the moon

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Daily Learning

  • Parshas Mishpatim – Summary, Torah Or, Likkutei Sichos, Video Shiurim; Halachos February 13, 2026
  • Daily Rambam (1) The Fourteen Books of the Mishneh Torah – Part 2 (Friday, 26th Shevat) February 13, 2026
  • Daily Chumash & Rashi – Parshas Mishpatim Shishi: Hashem warns Bnei Yisrael to heed the commands of his angel (Friday, Mishpatim 26th Shevat) February 13, 2026
  • Daily Tanya – Chapter 28 Part 1: Battling evil thoughts during service of G-d (Friday 26th Shevat) February 13, 2026
  • From the Ravs Desk: The Shabbos That Vanished: Halacha on the High Seas When Crossing The Dateline February 12, 2026
  • Peshara versus Din: The Powers and Limits of Pesharah – Part 2 February 12, 2026

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Recent Posts

  • Parshas Mishpatim – Summary, Torah Or, Likkutei Sichos, Video Shiurim; Halachos February 13, 2026
  • Daily Rambam (1) The Fourteen Books of the Mishneh Torah – Part 2 (Friday, 26th Shevat) February 13, 2026
  • Daily Chumash & Rashi – Parshas Mishpatim Shishi: Hashem warns Bnei Yisrael to heed the commands of his angel (Friday, Mishpatim 26th Shevat) February 13, 2026
  • Daily Tanya – Chapter 28 Part 1: Battling evil thoughts during service of G-d (Friday 26th Shevat) February 13, 2026
  • From the Ravs Desk: The Shabbos That Vanished: Halacha on the High Seas When Crossing The Dateline February 12, 2026
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