Question: Why wear Tefillin only in the daytime?


To begin with Dowa will understand where to speak of the mitzvah of tefillin

: "וְהָיָה לְךָ לְאוֹת עַל יָדְךָ וּלְזִכָּרוֹן בֵּין עֵינֶיךָ לְמַעַן תִּהְיֶה תּוֹרַת ה 'בְּפִיךָ, כִּי בְּיָד חֲזָקָה הוֹצִאֲךָ ה' מִמִּצְרָיִם ... וְשָׁמַרְתָּ אֶת הַחֻקָּה הַזֹּאת לְמוֹעֲדָהּ מִיָּמִים יָמִימָה" (שמות י"ג פסוק ט ').

על המילים "מימים ימימה" דרשו חז"ל: "מימים ימימה" - ימים ולא לילות (תלמוד בבלי, מסכת עירובין דף צ"ו עמוד א).

כלומר, שזמן התפילין הוא רק ביום.

That yst We can see that the word-combination Miyama Yamim leads us to the concept that we are talking about DAYTIME HOURS according to the sages of the Torah.

Also sages decreed that if a man will wear Tefillin night there is a chance that he falls asleep with tefillin and it is a problem!

It is also desirable to wear Tefillin in the morning as in the morning, we read the first - SMA of Israel, which directly relates to the mitzvah of tefillin.

Also it is better to wear Tefillin morning because during the day there can be problems in humans will not be near at hand tefillin, or just a person forgets Tefillin!

But in any case Tefillin must be worn only during the day!

And yet here is a great video on the subject: