“The (valid/worthy) fasting is on the day that you fast (all together). The (valid/worthy) iftar (a meal eaten to break fast after the sunset) is on the day that you eat all together. The (valid/worthy) sacrifice (al-qurban) is on the day that you slaughter sacrifices all together.” Tirmidhi, Sawm 11; Abu Dawud, Sawm 5)