Ayyam al-Bidh (white days)
MonthlyThe 13th, 14th, and 15th of each Hijri month are known as the white days (Ayyam al-Bidh) because the moon is full and the nights are bright. The Prophet ﷺ advised fasting three days of each month.
Hadith
أَوْصَانِي خَلِيلِي صلى الله عليه وسلم بِثَلاَثٍ صِيَامِ ثَلاَثَةِ أَيَّامٍ مِنْ كُلِّ شَهْرٍ وَرَكْعَتَىِ الضُّحَى وَأَنْ أُوتِرَ قَبْلَ أَنْ أَنَامَ
"My close friend (the Prophet ﷺ) advised me to do three things: to fast three days of each month, to pray two rak'at of Duha, and to pray Witr before sleeping."
Hadith
أَكَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم يَصُومُ مِنْ كُلِّ شَهْرٍ ثَلاَثَةَ أَيَّامٍ قَالَتْ نَعَمْ
"Did the Messenger of Allah ﷺ observe fast for three days during every month?" She (Aisha) said: "Yes."
Reward
Fasting three days of each month is equivalent to fasting the entire year.
Track this fast in Ayyam
Get reminded for every Sunnah fast with the Ayyam Hijri calendar.