As we usually see in Pakistan that In normal days Azan-e-Fajir is recited about 4:30am-5:00am in summers and in winters it ranging 5:45am - 6:00am depending upon the location. But when Ramadan comes, timing of Azan-e-Fajir changes and move back mininum one hour from normal days.Why a huge difference occur in one day? Why in one day this time moves back too fast?
The time for Fajr is from dawn till sunrise.
Since fasting must begin at dawn, during Ramazan they hold the congregation closer to its starting time, it is convenient.
During normal days they delay it while remaining within the time limits, and this is a practice of the Hanafi madhab.
" ويستحب الإسفار بالفجر " لقوله عليه الصلاة والسلام " أسفروا بالفجر فإنه أعظم للأجر "
Isfar (appearance of whiteness) is recommended for the fajr prayer, due to the words of the Prophet (God bless him and grant him peace), "Delay fajr till whiteness for it fetches the maximum reward."