Sawm time

Answered according to Hanafi Fiqh by
Where it is written that fasting time starting and end in which Hadith book, how about the six months day or night continuously fasting time.

بسم الله الرحمن الرحيم

(Fatwa: 1161/1118/L=09/1436)

The starting and ending time of sawm is mentioned in the holy Quran:
حَتَّى يَتَبَيَّنَ لَكُمُ الْخَيْطُ الأَبْيَضُ مِنَ الْخَيْطِ الأَسْوَدِ مِنَ الْفَجْرِ ثُمَّ أَتِمُّواْ الصِّيَامَ إِلَى الَّليْلِ [البقرة : 187]

(2) People living in such areas shall follow the timetable of the nearest cities of their country.

Allah knows Best!

Darul Ifta,
Darul Uloom Deoband