Time Tefillin

Shalom. What I have read from some online about time for Tefillin is the earliest time for in the morning prayers with Tefillin is seventy two minutes before sunrise. Is that so? Kol tov Chaim Jeshurun

ב"ה Shalom The Shulchan Aruch (30) speaks about the time that it is permissible to put on Tefillin and describes it as the time "one can recognize a casual friend from a distance of 4 Amot." There are two main opinions today as how to define this time on a clock. According to one opinion it is one hour before "Netz Hachama" = sunrise. Another opinion says 52 minutes before "Netz Hachama". There are other opinions of as well. Some say that these two major opinions are only relevant in Eretz Yisrael , but in other places it must be calculated. There are many websites which deal with Tefilla and Tefillin times around the globe where you can see things in detail. Ed. note: You can use the calendar on our website at yeshiva.co/calendar All the best