New tefillin and tzitzit during the Three Weeks

Hi,

May I wear new tzitzis or tefillin during the Three Weeks?

During the "Three Weeks" period between the 17th of Tammuz and Tishah b'Av we do not wear clothing which would require a berachah of shehechiyanu, because of the joy involved. This includes wearing a new tallis; it also applies to wearing tzitzis, where new tzitzis garments are uncommon and bring joy.

Many authorities do permit wearing a new garment on Shabbat, before the Nine Days begin. Some specify not to recite shehechiyanu, although they permit wearing a new garment on Shabbat. One should follow communal custom.

New tefillin may be worn during the Three Weeks. Even though some do recite shehechiyanu on the first occasion of wearing tefillin, that is because of joy in the mitzvah, not because of the joy of wearing new clothing.

(Mishneh Torah, Hilchot Berachos 11:9; Beit Yosef Orach Chaim 22:1; Birkei Yosef Orach Chaim 551:10-11; Avnei Nezer Orach Chaim 428; Chayyei Adam 133:8; Aruch haShulchan Orach Chaim 551:18; Rav Moshe Feinstein, Igrot Moshe Orach Chaim 3:80)

המצפה לישועה,
Mordechai