Summarizes the practical custom of avoiding haircutting during the mourning period of Sefirat HaOmer.
בִּימֵי הַסְּפִירָה מֵתוּ תַּלְמִידֵי רַבִּי עֲקִיבָא בְּל"ג יוֹם, וְלָכֵן נוֹהֲגִין בְּיָמִים אֵלּוּ קְצָת אֲבֵלוּת, שֶׁאֵין נוֹשְׂאִין נָשִׁים וְאֵין מִסְתַּפְּרִים. וְיֵשׁ חִלּוּקֵי מִנְהָגִים בְּמִסְפַּר ל"ג יָמִים הָאֵלֶּה, יֵשׁ מְקוֹמוֹת נוֹהֲגִין שֶׁחוֹשְׁבִין אוֹתָן מִיּוֹם רִאשׁוֹן דִּסְפִירָה, וְלָכֵן אוֹסְרִין עַד ל"ג בָּעֹמֶר. אַךְ כְּשֶׁחַל רֹאשׁ חֹדֶשׁ אִיָּר בַּשַׁבָּת, דְּיֵשׁ בּוֹ שְׁתֵּי קְדֻשּׁוֹת, קְדֻשַׁת שַׁבָּת וּקְדֻשַּׁת רֹאשׁ חֹדֶשׁ, אָז מַתִּירִין לִשָּׂא, וְכֵן לְהִסְתַּפֵּר בְּעֶרֶב שַׁבָּת. וּבְיוֹם ל"ג בָּעֹמֶר, וְכֵן מִשָּׁם וָאֵילֵךְ מַתִּירִין, מִפְּנֵי שֶׁבְּיוֹם ל"ג בָּעֹמֶר פָּסְקוּ מִלָּמוּת, וְלָכֵן מַרְבִּים בּוֹ קְצָת שִׂמְחָה, וְאֵין אוֹמְרִים בּוֹ תַּחֲנוּן. וְאַף שֶׁגַּם בּוֹ בַּיּוֹם מֵתוּ קְצָת, אָמְרִינָן מִקְּצָת הַיּוֹם כְּכֻלּוֹ, וְלָכֵן אֵין לְהִסְתַּפֵּר אוֹ לִשָֹּא עַד לְאַחַר שֶׁהֵאִיר הַיּוֹם, וְלֹא מִבָּעֶרֶב. אַךְ כְּשֶׁחַל ל"ג בָּעֹמֶר בְּיוֹם רִאשׁוֹן, מִסְתַּפְרִין בְּעֶרֶב שַׁבָּת שֶׁלְּפָנָיו, לִכְבוֹד הַשַׁבָּת. וְיֵשׁ מְקוֹמוֹת שֶׁמַּתִּירִין עַד רֹאשׁ חֹדֶשׁ אִיָּר וְעַד בִּכְלָל, שֶׁהֵן שִׁשָּׁה עָשָׂר יוֹם, וְנִשְׁאָרִים ל"ג יוֹם בְּאִסּוּר עַד חַג הַשָּׁבוּעוֹת (וּמִסְתַּפְּרִין בְּעֶרֶב הָחָג). וּמִכָּל מָקוֹם בְּיוֹם ל"ג בָּעֹמֶר בְּעַצְמוֹ מַתִּירִין. (וּכְשֶׁחָל בְּיוֹם רִאשׁוֹן, מַתִּירִין בְּעֶרֶב שַׁבָּת, כְּמוֹ שֶׁכָּתַבְתִּי לְעֵיל). וְיֵשׁ מְקוֹמוֹת שֶׁמַּתִּירִין עַד רֹאשׁ חֹדֶשׁ אִיָּר וְלֹא עַד בִּכְלָל, וּבְיוֹם רִאשׁוֹן דְּרֹאשׁ חֹדֶשׁ מַתְחִיל הָאִסּוּר, וְיוֹם רִאשׁוֹן דְּהַגְבָּלָה הוּא יוֹם הַלּ"ג, וְאַמְרֵינָן בּוֹ, מִקְּצָת הַיּוֹם כְּכֻלּוֹ, וּמֻתָּרִין לִשָּׂא וּלְהִסְתַּפֵּר בָּהֶן, וְגַם בְּיוֹם ל"ג בָּעֹמֶר מֻתָּרִין (וּכְמוֹ שֶׁכָּתַבְתִּי לְעֵיל), וּצְרִיכִין לִנְהֹג בְּכָל קְהִלָּה מִנְהָג אֶחָד, וְלֹא יְשַׁנּוּ לַעֲשׂוֹת מִקְּצָתָן כָּךְ וּמִקְּצָתָן כָּךְ. הַסַּנְדָּק (הוּא הַתּוֹפֵס אֶת הַתִּינוֹק בִּשְׁעַת מִילָה) וְהַמּוֹהֵל, וַאֲבִי הַבֵּן, מֻתָּרִין לְהִסְתַּפֵּר בְּיּוֹם שֶׁלִּפְנֵי הַמִּילָה סָמוּךְ לָעֶרֶב קֹדֶם הֲלִיכָה לְבֵית הַכְּנֶסֶת.
During [the first] thirty-three days of the Sefirah period (the counting of the Omer), the disciples of Rabbi Akiva perished. Therefore, it is the custom during these days to observe a partial state of mourning: Marriages should not be performed and you should not take a haircut (or shave). There are various customs regarding (the day on which to begin) to count these thirty-three days. Some communities have the custom of counting them beginning with the first day of the Omer, and, therefore, they forbid [weddings and haircuts] until Lag ba'omer (the 33rd day of the Omer). But when Rosh Chodesh Iyar occurs on Shabbos, which has two levels of kedushah (sanctity), the kedushah of Shabbos and the kedushah of Rosh Chodesh, they permit marriages and haircuts on erev Shabbos. On Lag ba'omer and from that day on, the restrictions are permitted, because on Lag ba'omer [Rabbi Akiva's disciples] ceased to die. We, therefore, rejoice somewhat, and we do not say Tachanun on that day. Although on that very day some of them died (mourning need not be observed for a full day), for the Halachah states, a part of a day is considered as a full day; therefore, you should not take a haircut, nor should weddings be held; until after dawn (of Lag ba'omer), but not in the evening. But if Lag ba'omer occurs on Sunday, you may take a haircut on the preceding erev Shabbos, in honor of Shabbos. In other communities, they permit (weddings and haircuts) until Rosh Chodesh Iyar, inclusive, which adds up to sixteen days. This leaves thirty-three days, during which these things are forbidden, [that is] until Shavuos, (but they permit haircuts on erev Shavuos). Nevertheless, on Lag ba'omer they permit (weddings and haircuts); (and if Lag ba'omer occurs on Sunday, they permit them on erev Shabbos, as I have written above.) In still other communities, they permit (these things) until Rosh Chodesh Iyar, exclusive of that day, and on the first day of Rosh Chodesh, the restrictions begin to apply. On the first of the three days of Hagbalah [the three days preceding Shavuos,] which is the thirty-third day (of the period the restrictions are in effect), they apply the rule, "A part of day is considered as a full day," and they, therefore, permit marriages and haircuts during these three days, as well as on Lag ba'omer, (as I have written above). It is essential that the entire community follow the same custom, and not that some follow one custom and others follow a different custom. The Sandak, (the person who holds the infant during the bris circumcision), the mohel, and the father of the infant, are permitted to take a haircut (and shave) on the day before the bris, towards evening, before going to the synagogue.
