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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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Calculating the new moon and creating a calendar of months

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  • 1570

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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  • 2058

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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When is Rosh Chodesh?

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  • 755

Why the Jewish people are compared to the moon

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Daily Learning

  • From Rav’s Desk: May a Havdalah Candle Be Used for the Shamash? (Thursday 21st Kisleiv) December 11, 2025
  • Daily Halacha – Mivtza Chanukah – The Rebbe’s Chanukah Campaigns, including Public Menorah lightings, Distributing Menorah’s and Sufganiyot, Gathering Children, Torah Study, and Farbrengens (Thursday 21st Kisleiv) December 11, 2025
  • Daily Rambam (1) Eidus Chapter 2: Chakiros, Derishos & Bedikos (Thursday 21st Kisleiv) December 11, 2025
  • Daily Tanach – Yirmiyahu 41 – The Murder of Gedaliah and the Flight Toward Egypt (Thursday 21st Kisleiv) December 11, 2025
  • Daily Chumash & Rashi Parshas Vayeishev Chamishi – Yosef in Mitzrayim (Thursday 21st Kisleiv) December 11, 2025
  • Daily Tanya – Hakdamas Hamilaket-Authors introduction to Tanya-Part 2 (Thursday, 21st Kisleiv) December 11, 2025

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Recent Posts

  • From Rav’s Desk: May a Havdalah Candle Be Used for the Shamash? (Thursday 21st Kisleiv) December 11, 2025
  • Daily Halacha – Mivtza Chanukah – The Rebbe’s Chanukah Campaigns, including Public Menorah lightings, Distributing Menorah’s and Sufganiyot, Gathering Children, Torah Study, and Farbrengens (Thursday 21st Kisleiv) December 11, 2025
  • Daily Rambam (1) Eidus Chapter 2: Chakiros, Derishos & Bedikos (Thursday 21st Kisleiv) December 11, 2025
  • Daily Tanach – Yirmiyahu 41 – The Murder of Gedaliah and the Flight Toward Egypt (Thursday 21st Kisleiv) December 11, 2025
  • Daily Chumash & Rashi Parshas Vayeishev Chamishi – Yosef in Mitzrayim (Thursday 21st Kisleiv) December 11, 2025
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