When to Wear Tefillin: Difference between revisions

# If one wears [[Tefillin on Chol HaMoed]] one shouldn’t wear [[Tefillin]] of Rabbenu Tam (even if one usually wears [[Tefillin]] of Rabbenu Tam). <Ref> Mishna Brurah 31:8 </ref>

# Some authorities hold that if some people in the Shul wear [[Tefillin]] and others don’t there’s a violation of Lo Titgodidu (don’t cause factions in observance of Torah) and so they advise that one should either find a shul that has your minhag or pray in different locations in the same shul. <Ref> Kitzur S"A 10:25 writes that there is an issue of Lo titgodedu for some people in the shul to wear [[Tefillin]] on [[chol hamoed]] and others not to wear [[Tefillin]]. Hilchot [[Chol HaMoed]] Zichron Shlomo (in the hebrew section pg 39-40) has a letter from Rav Moshe Feinstein, dated Kislev 5737, stating clearly that one should follow the minhag of the Shul and if the minhag is to wear [[Tefillin]] one should also. However, Rav Moshe Feinstein in Sh”t Igrot Moshe O”C 5:24 (pg 79 D”H Al Kol Panim) dated Kislev 5743, writes that in crowded shuls where there are many who wear [[Tefillin]] and many who don’t there’s no issue of Lo Tasu Agudot since it’s clear that there are two different minhagim. However, Rav Moshe adds that preferably someone who is praying in a shul that wears [[Tefillin]] should also wear [[Tefillin]]. Sh”t Teshuvot VeHanhagot 2:332 holds that there’s no real issue of [[Lo Titgodedu]] but preferably one should be concerned for those who hold that it’s an issue. [http://www.yutorah.org/lectures/lecture.cfm/766048/Rabbi_Hershel_Schachter/Shiur_#30_-_Yevamos_-_עשו_ב'ש_כדבריהם,_לא_תתגודדו Rabbi Schachter on yutorah.org (min 36-7)] ruled that it is an issue for some people in one [[minyan]] to wear [[Tefillin]] and others not to wear [[Tefillin]], however, two minyanim in one shul may not be an issue.</ref>