Must I Wear Tefillin All day? December 12, 2016 – י״ב בכסלו תשע״ז by HyehudiAll agree that each moment of Tefillin is the fulfillment of a Torah commandment. But is it obligatory?Rabbi Brand says no.Some other articles:The Chazon Ish: Pro Gold StandardGuilt Feelings About Removing Tefillin Too FastYou’re Not a Real Man if You Don’t Wear Leatherre: Removing Tefillin for Mussaf?What To Cry for on Tisha Be’avPowered by YARPP.