‘Id al-Fitr...
‘Id al-Fitr, the first of Shawwal, and ‘Id al-Adhha, the tenth of Dhu’l-Hijjah), on the Tashriq Days (the 11th, 12th, and 13th of Dhu’l-Hijjah), and on ‘Ashura' (the tenth of Muharram) as a day of blessings and delight. It is also forbidden to fast for two continuous days (without breaking the fast at the end of the first day and with one intention of fasting for both the days).
Recommended Fasting There are special occasions on which fasting is highly recommended because it is connected to certain characteristics that necessitate it. These occasions can be summed up in the following points: Traditions hold that fasting during the summertime is more preferable and more rewardable.
[^2] Some validly reported traditions have laid emphasis on fasting on Wednesdays for the reason that Hellfire, or divine chastisement, falls on such a day; therefore, to fast on Wednesdays protects against Hellfire.
However, it is not improbable that Wednesdays that fall in the middle of the months are the only ones intended, as is indicated by some of these traditions.[^3] Some other traditions hold the recommendation of fasting on Fridays, provided that fasting on the Wednesdays and/or Thursdays that precede these Fridays is also observed.