Answer: Preferably, the time to pray Shacharit is from sunrise and on. This time is printed in many calendars. There is, nevertheless, an extra special Mitzvah to pray Shacharit at the moment the sun rises, as the verse states, “They shall fear you with the sun.”

Preferably, one should not begin praying until sunrise. Nevertheless, if one prays Shacharit before sunrise, if this was done after dawn which is calculated as seventy-two seasonal minutes before sunrise, one has fulfilled his obligation. However, if one prays before dawn, one has not fulfilled his obligation since this time is still allocated for the Arvit prayer.

Any reference to “prayer” or…