Eid: How is the start of the Muslim festival determined?…more BBC
Validity of Global Moonsighting…more :PDF
وَعَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «صُومُوا لِرُؤْيَتِهِ وَأَفْطِرُوا لِرُؤْيَتِهِ فَإِنْ غم عَلَيْكُم فَأَكْمِلُوا عِدَّةَ شَعْبَانَ ثَلَاثِينَ»مُتَّفَقٌ عَلَيْهِ
The Ramadan start date for 2021 is expected to begin on Tuesday 13th April 2021.
Abu Huraira reported God’s messenger as saying, “Fast when you see it and break your fast when you see it, and if the weather is cloudy treat Sha‘ban as having thirty days.”(Bukhari and Muslim.)