Q. Thank you for explaining to me that it's OK to be in the Tefillin for the daf in the morning. I was wondering, if I wake up late and I can either make the Zman (time) for davening of Magen Avraham, or attend our Daf Yomi shiur. Should I attend the Daf Yomi shiur and daven late following the Hagra Zman or is it better to daven on time?
A. Horav Aharon Miller Shlit'a opinion is that in many shuls during Shabbos it is common to follow the zeman of the Gr'ah, Therefore, as long as you have read the Shema on time with tefilin, it is better to join the learning of the Daf and then continue with the rest of the Tefila before the end of the Hagra zeman.
Rabbi A. Bartfeld as advised by Horav Shlomo Miller and Horav Aharon Miller Shlit’a