Question 628: Can you please tell me the days on which it is forbidden to fast, according to Islam?
Answer 628: The followings are the days when fasting is prohibited:
- Fasts on the Eid al-Fitr and Eid al-Adhã.
- The fast on 30 of Sha’ban with the intention that it is a part of Ramadan
- The fast on the Day of Tashriq (i.e. on the 11th, 12th and 13th of Dhul Hijjah) for a person who is in Minã, regardless whether he is busy in performing the rites of Hajj or not.
- A votive fast kept for the performance of a sinful act
- A fast to keep silence, in the sense that the fast is kept with the intention of keeping silence, even if for a part of the day. There is no harm in keeping silence if it is not the intention of the fast, even if the person keeps silence throughout the day.
- The continuous fast. According to the stronger opinion it includes a fast with the intention of keeping it throughout the day and night until the morning or two days including the night. There is, however, no harm if breaking the fast is delayed until morning or the next night without such an intention for the fast, though it is more cautious to abstain from doing so.
Similarly, it is also more cautious for the wife to give up a recommended fast without the permission of her husband. Rather, caution must not be given up in case it entails some trouble, rather generally in case the husband disallows it.
For further information in this regards, please refer to the following answers:
Index: Things from which a person keeping fast must abstain & Kaffarah (Expiation), answer 372.
Index: Studying in the month of Ramadhan is not a valid excuse to escape fasting, answer 572.
Index: Using Asthma Inhaler does not break the Fast, answer 575.
Index: Number of things which are disapproved (Makruh) for a person observing fast, answer 566.
Index: Fasting and prayers of a traveler who travel after Zuhr, answer 384.
Index: Qada Fast for a person reverted to Islam, answer 196.
Index: Rules of prayers and fasting performed without ghusl, answer 034.
Index: Fast in countries with long days, answer 106.
Index: Niyyat for Fasting: How to make intention to Fast Ramadan, answer 627.
 . Tawzih al-Masael of Maraja (with annotation of Imam Khomeini (ra)), Vol. 1, Pg. 965; Tawzih al-Masael of Imam Khomeini (ra), Pg. 362; Tahrir al-Wasislah of Imam Khomeini (ra), Vol. 1, Chapter on the Prohibited Fasts; Tawzih al-Masael of Sayyid Sistani, Rues of Fasting, Q. 1707-1715; The official website of the office of Sayyid Sistani (ha), books, Islamic Laws, Fasting, Haram and Makrooh fasts.