
Chart of the Phases of the Moon (Encyclopedia Britannica)
- The moon is on a roughly 30 day cycle, with day 15 roughly being the full moon
וא"ר אחא בר חנינא אמר רב אסי אמר רבי יוחנן עד כמה מברכין על החדש עד שתתמלא פגימתה וכמה אמר רבי יעקב בר אידי אמר רב יהודה עד שבעה נהרדעי אמרי עד ששה עשר ותרוייהו כר' יוחנן סבירא להו הא למיהוי כי יתרא הא למיהוי כי נפיא אמר ליה רב אחא מדיפתי לרבינא וליבריך הטוב והמטיב אמר ליה אטו כי חסר מי מברכינן דיין האמת דלבריך הטוב והמטיב וליברכינהו לתרוייהו כיון דהיינו אורחיה לא מברכינן וא"ר אחא בר חנינא א"ר אסי א"ר יוחנן כל המברך על החדש בזמנו כאילו מקבל פני שכינה כתיב הכא (שמות יב, ב) החדש הזה וכתיב התם (שמות טו, ב) זה קלי ואנוהו תנא דבי רבי ישמעאל אילמלא (לא) זכו ישראל אלא להקביל פני אביהן שבשמים כל חדש וחדש דיים אמר אביי הלכך נימרינהו מעומד מרימר ומר זוטרא מכתפי (אהדדי) ומברכי א"ל רב אחא לרב אשי במערבא מברכי ברוך מחדש חדשים אמר ליה האי נשי דידן נמי מברכי אלא כדרב יהודה דאמר רב יהודה ברוך [וכו'] אשר במאמרו ברא שחקים וברוח פיו כל צבאם חוק וזמן נתן להם שלא ישנו את תפקידם ששים ושמחים לעשות רצון קונם פועלי אמת שפעולתן אמת וללבנה אמר שתתחדש עטרת תפארת לעמוסי בטן שהן עתידין להתחדש כמותה ולפאר ליוצרם על שם כבוד מלכותו ברוך אתה ה' מחדש חדשים
Rabbi Aḥa bar Ḥanina says, Rav Asi says, Rabbi Yoḥanan says: Until how many days into a new month may one recite a blessing on the month, i.e., Birkat HaLevana? Until the flaw of the moon is filled. How many days is that? Rav Ya’akov bar Idi says that Rav Yehuda says: Until seven days of the month have passed. The Sages of Neharde’a say: Until sixteen days of the month have passed. They both hold by the opinion of Rabbi Yoḥanan (one can recite the blessing until the flaw of the moon is filled). R Rav Ya’akov bar Idi understands Rabbi Yoḥanan to be referring to the day when the moon will be like the string of a bow. (Before the moon appeared merely as a bow, and after seven days it appears like a half-circle, like a bow that has a string.) The Sages of Neharde’a understand Rabbi Yoḥanan to be referring to when the moon will be like a sieve, i.e., a full circle. § Rav Aḥa of Difti said to Ravina: And they should bless "Who is good and Who does good." Ravina said to him: Does that imply that when the moon is shrinking we bless: "the true Judge", so that we should conversely bless: "Who is good and Who does good", when the moon is growing? Rav Aḥa of Difti said to him: You are correct, and we should say them both. Ravina answered him: Since this is its nature, we do not bless the moon. Rabbi Aḥa bar Ḥanina says that Rabbi Asi says that Rabbi Yoḥanan says: Anyone who blesses the new month in its proper time, it's as if he greets the Face of the Divine Presence. Alluding to this: “This month shall be for you the beginning of months” (Exodus 12:2), and, “This is my God and I will glorify Him” (Exodus 15:2). The term “this” is employed in both verses. Rabbi Yishmael taught: If the Jewish people merited to greet the Face of their Father in Heaven only one time every month, it would suffice for them. Abaye said: Therefore, we say the blessing while standing, in honor of the Schina. Mareimar and Mar Zutra would lean on one another’s shoulders and recite the blessing. Rav Aḥa said to Rav Ashi: In the West, Eretz Yisrael, they recite the following blessing on the moon: Blessed is He Who renews the months. Rav Ashi said to him: Our women also recite that blessing, as Rav Yehuda says: Blessed are You, Lord our God, King of the Universe, Who by His word created the heavens, and by the breath of his mouth all their hosts. He set for them a law and a time, that they should not deviate from their task. And they are joyous and glad to perform the will of their Owner; they are workers of truth whose work is truth. And to the moon He said that it should renew itself as a crown of beauty for those He carried from the womb, as they are destined to be renewed like it, and to praise their Creator for the name of His glorious kingdom. Blessed are You the Lord, Who renews the months.
- We're starting with the question of when do we say Kiddush Levana, not do we say Kiddush Levana or any source for it from a pasuk
- Parameters of this Bracha: Said once a month on the renewal of the moon (not the moon itself) and said standing
- Differentiating this Bracha from HaTov V'HaMetiv (which is said on events that are positive for a lot of people) and Dayan HaEmet (which is said on events that are negative for a lot of people)
- Fundamental disagreement on whether you can say Kiddush Levana until 7 days have passed or until 16 days have passed based on what it means for the "pigum" (flaw) of the moon to be filled
- We already see that women are saying this Bracha since its inception as proof of its existence in Bavel
הָרוֹאֶה אֶת הַלְּבָנָה בְחִידּוּשָׁהּ אוֹמֶר בָּרוּךְ מְחַדֵּשׁ חֳדָשִׁים. עַד אֵיכָן. רִבִּי יַעֲקֹב בַּר אָחָא בְּשֵׁם רִבִּי יוֹסֵי עַד שֶׁתֵּרָאֶה כַּחֲצִי הַמַּטֶּה. רִבִּי אָחָא וְרִבִּי חִינְנָא בְשֵׁם רִבִּי יוֹסֵי עַד שֶׁתִּתְמַלֵּא פְגִימָתָהּ. רַבָּנָן דְּקֵיסַרִין אָֽמְרִין עַד אַרְבָּעָה עָשָׂר יוֹם. אָמַר רִבִּי יוֹסֵי בֵּי רִבִּי בוּן וְיֵאוֹת. כְּלוּם מִתְמַלְּאֵת פְּגִימָתָהּ אֶלָּא עַד אַרְבָּעָה עָשָׂר יוֹם. הָא כָּל־אַרְבָּעָה עָשָׂר יוֹם צָרִיךְ לְבָרֵךְ.
He who sees the moon in its renewal says: Praise to Him Who renews months. Until when? Rebbi Jacob bar Aḥa in the name of Rebbi Yose: Until it is seen like half a stick. Rebbi Aḥa and Rebbi Ḥinena in the name of Rebbi Yose: Until its missing part is filled. The rabbis of Caesarea say, until the fourteenth day. Rebbi Yose bar Abun said, that is correct; the missing part is never filled before the fourteenth day. Hence, all fourteen days one needs to recite the benediction.
- Same wording of the Bracha as we saw in the Bavli
- Fundmenetal disagreement on whether the Bracha can be said until 14 days have passed or until 7 days have passed based on what it means for the "pigum" (flaw) of the moon to be filled
הָרוֹאֶה לְבָנָה בְּחִדּוּשָׁהּ מְבָרֵךְ בָּרוּךְ אַתָּה הּ׳ אֱלֹקֵינוּ מֶלֶךְ הָעוֹלָם אֲשֶׁר בְּמַאֲמָרוֹ בָּרָא שְׁחָקִים וּבְרוּחַ פִּיו כָּל צְבָאָם חֹק וּזְמַן נָתַן לָהֶם שֶׁלֹּא יְשַׁנּוּ אֶת תַּפְקִידָם שָׂשִׂים וּשְׂמֵחִים לַעֲשׂוֹת רְצוֹן קוֹנֵיהֶם פּוֹעֲלֵי אֱמֶת וּפְעֻלָּתָם צֶדֶק וְלַלְּבָנָה אָמַר שֶׁתִּתְחַדֵּשׁ עֲטָרָה תִּפְאֶרֶת לַעֲמוּסֵי בָטֶן שֶׁהֵם עֲתִידִין לְהִתְחַדֵּשׁ כְּמוֹתָהּ וּלְפָאֵר לְיוֹצְרָם עַל כְּבוֹד מַלְכוּתוֹ וְעַל כָּל מַה שֶּׁבָּרָא בָּרוּךְ אַתָּה הּ׳ מְחַדֵּשׁ הֶחֳדָשִׁים:
(יז) וְצָרִיךְ לְבָרֵךְ בְּרָכָה זוֹ מְעֻמָּד. שֶׁכָּל הַמְבָרֵךְ עַל הַחֹדֶשׁ בִּזְמַנּוֹ כְּאִלּוּ הִקְבִּיל פְּנֵי הַשְּׁכִינָה. אִם לֹא בֵּרֵךְ עָלֶיהָ בַּלַּיִל הָרִאשׁוֹן מְבָרֵךְ עָלֶיהָ עַד שִׁשָּׁה עָשָׂר יוֹם בַּחֹדֶשׁ עַד שֶׁתִּמָּלֵא פְּגִימָתָהּ:
When a person sees the moon after it is renewed, he should recite the blessing: Blessed are You, God, our Lord, King of the universe, who created the heavens with His word and all their hosts with the breath of His mouth. He granted them a fixed law and schedule so that they should not alter their tasks. They rejoice and are glad to carry out the will of their Creator. They are faithful servants whose work is righteous. And He instructed the moon to renew itself as a crown of glory to those who are borne [by Him] from the womb, who are destined to be similarly renewed and to glorify their Creator for the name of the glory of His kingdom and for all He has created. Blessed are You, God, who renews the months.
(17) This blessing should be recited while standing, for whoever recites the blessing on the new moon at its appropriate time is considered as if he greeted the Divine Presence. If a person did not recite the blessing on the first night, he may recite the blessing until the sixteenth of the month, until the moon becomes full.
- Directly takes the wording of the Bracha from the Gemara
- Rules that ideally you should say the Bracha the first time you see the moon, or until the 16th of the month (rules according to the Bavli)
- This Mishnah Torah is indicative of Kiddush Levana being brought down as practical Halacha for the first time instead of some behavior mentioned in the Gemara
ואין מברכין על הירח אלא במוצאי שבת כשהוא מבושם ובכלים נאים ותולה עיניו כנגדה ומיישר את רגליו ומברך אשר במאמרו ברא שחקים...: ואומר ג"פ סימן טוב סימן טוב [תהיה] לכל ישראל ברוך יוצרך ברוך עושך ברוך קונך ברוך בוראך ורוקד ג׳ רקידות כנגדה ואומר ג"פ כשם שאני רוקד כנגדך ואיני נוגע ביך כך אם ירקדו אחרים כנגדי [להזיקני] לא יגעו בי תפול עליהם אימתה ופחד ולמפרע אמן אמן סלה הללויה ואומר לחבירו ג"פ שלום וילך לביתו בלב טוב והדא היא לכל מפסיקין לראשי חדשים:
The benediction over the moon must not be said except at the conclusion of the Sabbath when one is in an exhilarated mood and well dressed. [43a] He directs his eyes towards the moon, places his feet together and pronounces the benediction ‘Who didst create the heavens by Thy word ... Then one says three times, ‘A good sign, a good sign, shall it be for all Israel. Blessed be He Who formed you, blessed be your Maker, blessed be your Possessor, blessed be your Creator’. Turning in the direction of the moon, he jumps three times and exclaims three times, ‘As I jump towards thee but do not touch thee, so if others should jump against me to hurt me may they not touch me. Let terror and dread fall upon them and may this be retrospective, Amen, Amen, Selah. Praise you the Lord’. He then says ‘Peace’ three times to his fellow and goes home with a cheerful heart.
- Adds that Kidduish Levana should be said Motzei Shabbat ideally
- Adds a few things to say after the Bracha brought down in the Bavli
ברכת הלבנה: אמר רב יהודה הרואה לבנה בחידושה אומר "בא"י אמ"ה אשר במאמרו ברא שחקים וברוח פיו כל ..." פי' פועל אמת הקב"ה שפעולתו אמת שבדין מיעט הלבנה ויש גורסין פועלי אמת ופעולתם אמת וחוזר על צבא השמים שפעולתם אמת ואין משנין סדרן. א"ר יוחנן עד מתי מברכין על החדש? עד שתתמלא פגימתו אבל מכאן ואילך כבר הוא ישן ואינו ראוי לברך על חידושו וכמה פירוש מתי תתמלא פגימתו רב יהודה אומר עד ז' שנתמלא הפגימה והיא כחצי עגולה ונהרדעי אמרי עד י"ו ולא י"ו בכלל שנעשה כולו שלם והלכתא כנהרדעי והני י"ו משעת המולד מונין אותם ולא מיום קביעות החדש תנא דבי רבי ישמעאל אילו לא זכו ישראל אלא להקביל פני אביהם שבשמים פ"א בכל חודש דיים אמר אביי הלכך מברכין מעומד מרימר ורב אשי מכתפי להו ומברכי פי' דרך חשיבות להקביל פני שכינה דרך כבוד גרסינן במס' סופרים אין מברכין על הירח אלא במ"ש כשהוא מבושם ובגדיו נאים ותולה עיניו כנגדה ומיישר רגליו ומברך ואומר ג"פ סי' טוב תהיה לכל ישראל ברוך בוראך ברוך יוצרך ברוך מקדשך ורוקד ג"פ כנגדה ואומר בכל פעם כשם שאני רוקד כנגדך ואיני יכול ליגע בך כך אם ירקדו אחרים כנגדי להזיקני לא יגעו בי ואומר תפול עליהם אימתה ופחד בגדול זרועך ידמו כאבן ולמפרע כאבן ידמו זרועך בגדול ופחד אימתה עליהם תפול ואומר כן ג"פ אמן ואמן הללויה ואומר לחבירו ג"פ שלום עליך וילך לביתו בלב טוב וי"א בזה הסדר ברוך יוצרך ברוך עושך ברוך קונך ברוך בוראך וסימן יעקב והיא רמז לו:
The blessing on the moon: Rav Yehudah says: one who sees the moon in its newness says 'Blessed are You Hashem who didst create the heavens by Thy word and all their hosts with the breath of His mouth...'" This means that Hashem acts in truth and His actions are true in the judgment to reduce the moon and some people say doers of truth and their doings are true and it's talking about the heavenly army that their actions are true and you don't change their order. Rabbi Yochanan says: Until when do we bless the month? Until its deficiency is filled, but from then on it's old and it's not fit to bless on its newness and many explained when its deficiency is filled. Rav Yehudah says: Until 7 days when its deficiency is filled and its a half circle and Nehardeai say: Until 16 days and not the 16th day when its totally whole and the Halacha is like Nehardeai and the 16 days are counted from the Molad and not from the day the month is declared. Rabbi Yishmael says: If Yisrael only merited to greet the face of their Father in Heaven once a month, it would be enough. Abaye says: Therefore we bless standing. Meimar and Rav Ashi would lean on each others shoulders and bless in order to give more importance to greeting the Schina honorably. It says in Mesechet Sofrim: Don't bless the on the moon except on Motzei Shabbat when you are Mevusam (spiced, intoxicated vibes, see Purim "Chayav Inish L'Bvsumei") and your clothes are nice and you turn your eyes facing the moon and straighten your legs and bless and say 3 times "It should be a good sign for all of Israel" "Blessed is your Creator, blessed is your Maker, Blessed it your Sanctifier" and dance 3 times towards the moon and say every time "Just like I am dancing and I can't reach you (the moon) so too if others advance against me to harm me they shouldn't be able to reach me" and say "Dread and fear should fall upon them, with the largeness of your arm they will become silent as stone" and to change the order "Like a stone, your arm will be large and your fear will fall upon them" and say this 3 times "Amen and amen Praise Hashem" and say to their friend 3 times "Peace be upon you" and go home with a good heart and some say it's in this order "Blessed is your Maker, Blessed is your Designer, Blessed is your Acquirer, Blessed is your Creator, and a sign for Yaakov and its a hint to him"
- Rules according to Chachmei Nehardia (until 16 days have passed)
- Explains that we start counting the days from the molad rather than from when Chazal used to declare the new month by verifying the witnesses and it was only later that these two rituals were tied together
- Brings down that we stand and references Mesechet Sofrim to say that we should say Kiddush Levana standing
- Brings the wording from the Gemara and the extra things that we see found in Mesechet Sofrim
- The Beit Yosef on this brings a couple more points:
1. The light of the moon needs to be strong and recognizable when the Bracha is said, so you can't say the Bracha before the third day of the new moon
2. Brings down like Mesechet Sofrim and the Tur that you need to say it when you heart is "Mevusam" i.e. with the Besamim of Havdalah i.e. Motzei Shabbat
(א) ברכת הלבנה וזמנה ובו ד סעיפים:
הרואה לבנה בחדושה מברך אשר במאמרו ברא שחקים וברוח פיו כל צבאם חוק וזמן נתן להם שלא ישנו את תפקידם וכו': הגה ואין לקדש החדש אלא בלילה בעת שהלבנה זורחת ונהנין מאורה (אגור):
(ב) אין מברכין על הירח אלא במוצאי שבת כשהוא מבושם ובגדיו נאים: הגה ודוקא אם ליל מוצאי שבת הוא קודם י' בחדש אז ממתינין עד מוצאי שבת אבל אם היא אח"כ אין ממתינין עד מוצאי שבת שמא יהיו ב' לילות או ג' או ד' עננים ולא יראו הלבנה ויעבור הזמן וכשמקדשין אותה בחול יש ללבוש בגדים נאים (ת"ה סי' ל"ה) . אין מקדשין הלבנה קודם תשעה באב ולא קודם י"ה (מהרי"ל) ובמוצאי י"כ מקדשין אותה דאז שורין בשמחה אבל לא במוצאי תשעה באב או שאר תענית (ד"ע) ואין מקדשין אותה במוצאי שבת שחל בו י"ט (מהרי"ל הל' י"ט) ותולה עיניו ומיישר רגליו ומברך (מעומד) (טור) ואומר שלשה פעמים סימן טוב תהיה לכל ישראל ברוך יוצרך וכו': הגה ורוקד ג' פעמים כנגדה ואומר כשם שאני רוקד כו' ואומר תפול עליהם וגו' ולמפרע כאבן ידמו כו' ג' פעמים ואומר לחבירו ג"פ שלום עליך (הג"ה החדשות) ומשיב הוי כשואל (טור) ונוהגין לומר דוד מלך ישראל חי וקים שמלכותו נמשל ללבנה ועתיד להתחדש כמותה וכנסת ישראל תחזור להתדבק בבעלה שהוא הקב"ה דוגמת הלבנה המתחדשת עם החמה שנאמר שמש ומגן ה' ולכן עושין שמחות ורקודין בקדוש החדש דוגמת שמחת נשואין: (בחיי פרשת וישב וד"ע):
(ג) עד אימתי מברכין עליה עד י"ו מיום המולד ולא י"ו בכלל: (ואין לקדש אלא עד חצי כ"ט י"ב תשצ"ג מן המולד) (תשובת מהרי"ל):
(ד) אין מברכין עליה עד שיעברו שבעת ימים עליה: הגה ואין מקדשין הלבנה תחת הגג: (הגהות אלפסי החדשות):
The Blessing on the Moon and its time and there are 4 sections:
(1)One who sees the moon in its newness blesses "Blessed are You, Lord our God, King of the Universe, Who by His word created the heavens, and by the breath of his mouth all their hosts. He set for them a law and a time, that they should not deviate from their task..." Rema: And you shouldn't sanctify the month except at night at a time when the moon is shining and you benefit from its light.
(2) Don't bless on the moon except for Motzei Shabbat when you are Mevusam and your clothes are nice. Rema: And specifically if the night of Motzei Shabbat is before the 10th then you wait until Motzei Shabbat, but if it's after, you don't wait until Motzei Shabbat lest there are 2-4 nights of clouds and you don't see the moon and the time passes and when you sanctify it during the week, you should wear nice clothes. We don't sanctify the moon before Tisha B'Av or Yom HaDin and on Motzei Yom Kippur we sanctify it because then we are filled with happiness but not Motzei Tisha B'Av or the rest of the fasts and you don't sanctify it on Motzei Shabbat that falls on Yom Tov. And you set your eyes upon it and straighten your legs and bless and say 3 times "it should be a good sign for all of Israel, Blessed be your Creator" Rema: And dance 3 times towards it and say "Just like I am dancing and I can't reach you (the moon) so too if others advance against me to harm me they shouldn't be able to reach me" and say "Dread and fear should fall upon them, with the largeness of your arm they will become silent as stone" and to change the order "Like a stone, your arm will be large and your fear will fall upon them" and say this 3 times "Amen and amen Praise Hashem" and say to their friend 3 times "Peace be upon you" and we say "David the King of Israel is alive and well" since his kingdom is a parable for the moon and it will be renewed like the moon and Bnei Yisrael will return to cling to their Master that is Hashem. The parable is the Moon that renews with the sun it says "the Sun and Hashem the Protector" and therefore we make happiness and dance during Kiddush HaChodesh similarly to the happiness of marriage.
(3) Until when do we bless on it? Until the 16th from the Molad and not including the 16th and you don't sanctify until the half 29th, 12th hour, Tashtzag from the Molad.
(4) You don't bless on it until after 7 days have passed over it Rema: and you don't sanctify the moon under a roof
- Brings down Halacha like the Beit Yosef (that you can say Kiddush Levana until the 16th of the month and not including the 16th of the month) and adds that your clothing should be nice while you're saying it
- The Shulchan Aruch only brings the Bracha we found in the Bavli as halacha and the Rema adds in the extra pesukim we saw in Mesechet Sofrim
- The Rema also raises the possibility of clouds, making it hard to say a Bracha on a moon you can't see. Conclusions: If Motzei Shabbat is after the 3rd of the month, but before the 10th, then you wait until Motzei Shabbat, because if it's before the 3rd, the light isn't strong enough and if its after the 10th, we fear that there will be 2-4 days of clouds and we will miss our oppurtunity.
נשים פטורות - דמ"ע שהז"ג הוא ואף על גב דהם מקיימות כל מ"ע כגון סוכה מ"מ מצוה זו אין מקיימים מפני שהם גרמו פגם הלבנה (של"ה) עמ"ש ססי' רצ"ו ובסנהדרין פ"ה אמרי' על ברכת הלבנה הני נשי דידן נמי מברכי משמע קצת דמברכין ואפשר דל"ד נשים אלא לישנא בעלמא נקט: סומא חייב לקדש הלבנה (רש"ל בתשו'):
Women are patur: because it is a time-bound positive commandment. And even though they MAY fulfil all time-bound positive commandments, like sukkah, nevertheless, they should not fulfill this mitzvah because they caused the diminishment of the moon (acc to the Shelah) see what he wrote at the end of siman 296. And in Sanhedrin perek 5 it says regarding blessing the moon “our women also make this blessing” it implies a bit that they actually make the blessing, but it is possible that this is not actually referring to women [saying the blessing] but rather it is a manner of speech. A blind person is obligated in Kiddush Levana.
- The Magen Avraham is the first one to raise the possibility that this is a Mitzvah Aseh She'HaZman Grama thus making women exempt
-To make this claim the Magen Avraham also has to say women are exempt from Rabbinic time-bound mitzvot as the Tosfot says and is the general consensus, but Rabbainu Tam says women are obligated in Rabbinic time-bound positive commandments which would make the Magen Avraham's point moot
- Once women are exempted, the Magen Avraham has more flexibilty to prohibit women from saying Kiddush Levana using a Kabbalistic reason from the Shlah
- The Mishna Brurah brings this prohibition down as Halacha
והנשים לא נהגו בברכת הלבנה, כי היא מצות עשה שהזמן גרמא, ופטורות. ואף שבכמה מצוות עשה נהגו לקיים, כמו שופר, ולולב, וסוכה – מכל מקום בזה לא נהגו. ובגמרא שם משמע להדיא דבימיהם היו גם הנשים מברכות ברכה קצרה: "ברוך מחדש חודשים", עיין שם.
And women don’t normally say the Blessing on the moon because it’s a positive time-bound commandment, and they’re exempt. Even though with many positive time-bound commandments, women normally uphold like Shofar, Lulav, and Sukkah, in any case they don’t normally do it. And in the Gemara it means to say that in their days women would also bless a short Bracha “Blessed is the Renewer of the months”.
The Aruch HaShulchan offers a middling opinion, women are not obligated to and normally don't say Kiddush Levana because it is a time-bound positive commandment, but there is not a prohibiton of doing it.
Nefesh HaRav, Likutei Hanhagot, Binyan Brachat Kiddush Levana, p. 176


With regard to the Blessing of Sanctifying the Moon: It says in the Gemara in Sanhedrin (44a) “Women would also bless,” which shows even women blessed the Blessing of Sanctifying the Moon. And what is written in some of the Achronim, that women are exempt because it (Kiddush Levana) is a positive time-bound commandment, clearly this is very strange, that also women would be exempt from Birkat HaMazon because it is time-bound because you can’t say Birkat HaMazon after the food has already been digested in your guts. Clearly, this isn’t right, because the Bracha is dependent on the presence of food in the gut and that is realistically dependent on a contained time, so the Bracha itself in its essence is not dependent on any obligating time. Here also, one who sees the moon in its newness is required to bless, and within the time of its newness there is a particular time, but this doesn’t say the time is what obligated a person to say the Bracha, and because of this, it seems that here there is no essence of time-bound obligation here.
- Rav Soloveitchik reads Rambam putting Kiddush Levana with the rest of the Brachot on seeing things as Rambam showing that Kiddush Levana is a volentary Bracha made when someone sees the moon i.e. a Bracha Reshut meaning that women are equally obligated once they see the moon.