Must Fajr Prayer be performed approximately 15 minutes after the Adhan Al-Natijah throughout the year?

A controversy has arisen in Egypt regarding the difference between the time of the Fajr adhan (definition) (call to prayer) based on astronomical observation and bare eye sighting. The ruling is tied to direct visual sighting, as Allah Almighty says: "And eat and drink until the white thread of dawn becomes distinct to you from the black thread [of night] (2:187)." It is advisable to consult the scholars in your country, as they are more knowledgeable about the reality of the matter. The Fajr prayer is often performed about twenty minutes after the adhan, which ensures that the prayer takes place after the entry of its prescribed time. Women and those excused from congregational prayer should observe this as a precautionary measure.