Is it permissible to fast on Monday and dedicate it to the Messenger of Allah (peace and blessings be upon him)?

Question:
Is it permissible to fast on Monday and dedicate it to the Messenger of Allah (peace and blessings be upon him)?

Answer:
This is not permissible because there is no report that one should fast on Monday and dedicate it to the Messenger of Allah (peace and blessings be upon him). Rather, it is reported that a person should fast on Monday and Thursday of every week for himself; he fasts for himself. The Prophet (peace and blessings be upon him) used to fast on Monday and Thursday and say, "They are two days on which the deeds of worship are presented to Allah, and I love for my deeds to be presented while I am fasting." Therefore, it is recommended for the Muslim to fast on Monday and Thursday for himself. As for dedicating its reward to the Messenger or to anyone other than the Messenger, there is no evidence for this, so it is not done. May Allah reward you with good.