«إذا أقبل الليل من هاهنا وأدبر النهار من هاهنا وغربت الشمس فقد أفطر الصائم»
The Prophet (peace and blessings be upon him) said:
"When the night approaches from this side (the east), the day departs from this side (the west), and the sun has set, then it is time for the fasting person to break his fast."
Hadith Referenceصحیح الجامع الصغیر / حرف الألف / 364