Question: Is it permissible to fast 'Aashooraa. just one day?Response: It is permissible to fast the day of 'Aashooraa. (tenth day of Muharram) just one day, however, it is better to fast the day before it or the day after it (also) and this is the established Sunnah of the Prophet (sal-Allaahu `alayhe wa sallam) who said: ((If I am (still) here next year, then certainly I shall fast the ninth (day of Muharram))), [(reported by) Muslim, Ahmad, Ibn Maajah, Ibn Abee Shaybah, at-Tahaawee, al-Bayhaqee and al-Baghawee]. Ibn 'Abbaass (radhi-yallaahu...