During Kiddush Levanah, a brief prayer is recited, that God "fill the defect of the moon, that there should be no more diminution thereof, and that the moon's light be like the sun's light and like the light of the Seven Days of Creation..." [trans. mine]

What does this mean? Are we really praying that the moon stop its phases and outshine the sun? And how will we be able to keep the calendar if there's never a "new moon"?


Yeshaya prophesied

"וְהָיָ֤ה אוֹר־הַלְּבָנָה֙ כְּא֣וֹר הַחַמָּ֔ה וְא֤וֹר הַֽחַמָּה֙ יִֽהְיֶ֣ה שִׁבְעָתַ֔יִם כְּא֖וֹר שִׁבְעַ֣ת הַיָּמִ֑ים בְּי֗וֹם חֲבֹ֤שׁ יְהֹוָה֙ אֶת־שֶׁ֣בֶר עַמּ֔וֹ וּמַ֥חַץ מַכָּת֖וֹ יִרְפָּֽא"

"And the light of the moon will be like the light of the sun and the light of the sun will be seven times like the light of the seven days in a day which Hashem bandages the breakage of his people and the crush of his strike he heals."

-Isa. 30:26

The prayer is essentially for this day to come.

  • 1
    This passuk is what the OP is quoting - we say it in the section of Kiddush Levanah in question. The OP’s question seems to be what exactly this passuk means. This doesn’t address the question at all. – DonielF Apr 2 '18 at 20:52

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