Reference: Fataawa al-Lajnah ad-Daa.imah lil-Buhooth al-‘Ilmiyyah wal-Iftaa. – Volume 10, Page 400, Fatwa No.10962
Question: What is obligatory upon the Muslim to do on the day of ‘Aashooraa (tenth day of Muharram), and is Zakaat al-Fitr obligatory [on that day]?
Response: It is legislated for the Muslim to fast on the day of ‘Aashooraa., for that which has been confirmed that the Prophet (sal-Allaahu ‘alayhi wa sallam) ordered fasting on [the day of] ‘Aashooraa, however, when [the fasting of] Ramadhaan was obligated, whoever preferred to fast [‘Aashooraa] did so and whoever preferred not to [do so] did not. And there is no Zakaat al-Fitr [to be paid] on the day of ‘Aashooraa. as there is on ‘Eed al-Fitr after the month of Ramadhaan. And with Allaah lies all the success, and may Allaah send prayers and salutations upon our Prophet Muhammad (sal-Allaahu ‘alayhi wa sallam) and his family and his companions.