Questions about the rules of fasting on Fridays arise quite often, especially when someone wants to make up for Ramadan fasts, fulfill a vow, or perform a sunnah fast that happens to fall on a Friday. Amidst the spirit of worship, it is important to understand how Sharia law views fasting on that day.
In Islam, Friday is a special day. It is referred to as sayyidul ayyam or the master of all days. On this day, Muslims are encouraged to increase their worship, such as reading the Qur’an, reciting salawat, attending Friday prayers, and praying. However, precisely because of its special nature, there are specific provisions regarding fasting on Fridays.
Prohibition of Fasting Specifically on Fridays
The Prophet Muhammad (peace be upon him) gave very clear instructions regarding fasting on Fridays. In a hadith narrated by Muhammad through Imam Bukhari and Muslim, it is stated:
“Let none of you fast on Friday, unless he fasted the day before or the day after.”
This hadith indicates that designating Friday alone for sunnah fasting is makruh. This means that it is not recommended and should be avoided.
Why is that? Because Friday is a day that should be filled with physical strength for worship, especially attending Friday prayers and other worship activities. Fasting is feared to weaken the body, thereby reducing the solemnity of worship on that day.
When is Fasting on Friday Permissible?
Although there is a prohibition on specifically fasting on Friday, this does not mean that fasting on that day is completely forbidden. Fasting on Friday is permissible under certain conditions.
If someone fasts on Thursday and continues on Friday, or Friday and continues on Saturday, then this is not included in the prohibition. Similarly, if the fast is an obligatory fast such as the qadha Ramadan fast, the nazar fast, or the kafarat fast, then it is still permissible even if it falls on Friday alone.
Sunnah fasting, which has a specific sequence of days, such as the fast of David, is also permissible even if it happens to fall on a Friday. This is because the intention is not to specify Friday, but to follow the predetermined fasting pattern.
The provisions regarding the law of fasting on Friday teach balance in worship. Islam not only pays attention to the spiritual side, but also to the physical condition of a Muslim.
Friday is the day when Muslims gather for Friday prayers. This activity requires physical and mental readiness. By not specifying fasting on Friday, a Muslim can perform their worship more optimally.
On the other hand, Islam still provides leeway for those who have fasting obligations or perform scheduled sunnah fasting.
Often, someone has good intentions to increase their voluntary fasting without knowing this provision. In fact, following the guidance of the Prophet Muhammad SAW is part of the perfection of worship itself. Knowing the rules of fasting on Friday helps us worship more appropriately, in accordance with the guidance of the Sharia, and not merely based on enthusiasm alone.
If you wish to perform a voluntary fast and the schedule falls on a Friday, the best approach is to combine it with fasting on Thursday or Saturday.
Fasting on Friday is not absolutely prohibited. What is not recommended is to restrict voluntary fasting solely to Friday.
If it is accompanied by fasting on the day before or after, or if the fast is obligatory, then it is permissible.
By understanding this, a Muslim can perform the fast in a manner more in line with the guidance and still maintain the special status of Friday as the best day of the week.