Fasting Mondays and Thursdays is the Prophet’s ﷺ own weekly rhythm — rich in reward, backed by modern research, and easier to sustain than most people expect once you know how.
We have written before about the Sunnah of fasting Mondays and Thursdays — the Prophet’s ﷺ twice-weekly fast and the reasons he gave for it, which reach far beyond the metabolic benefits modern science has since discovered. If you have not read it, start with The Sunnah of Fasting Mondays and Thursdays. Here we turn to the practical: how to actually take up and sustain this fast, because it is one of the highest-value voluntary acts of worship a believer can build into their week, and doing it well is more achievable than it first appears.
The Prophet ﷺ gave two reasons that frame the whole practice. Of Monday, he said: “That is a day on which I was born, and on which I was sent [with revelation].” (Muslim 1162) — gratitude expressed through worship. And of both days: “Deeds are presented [to Allah ﷻ] on Mondays and Thursdays, and I like my deeds to be presented while I am fasting.” (al-Tirmidhi 747). This is the deeper motive: on the two days your record is shown to Allah ﷻ, the Prophet ﷺ wished to be found in a state of worship. Fasting these days is a way of meeting that weekly presentation in the best possible condition.
The Rewards and Benefits
The reward of voluntary fasting is immense in itself. The Prophet ﷺ said: “Whoever fasts a day for the sake of Allah ﷻ, Allah ﷻ will distance his face from the Fire by seventy years.” (Bukhari 2840, Muslim 1153), and in a hadith qudsi, Allah ﷻ says of fasting: “It is for Me, and I shall reward it” (Bukhari 1904) — singling out the fast for a reward whose measure He keeps with Himself. Beyond reward, fasting trains the nafs in restraint, weakening its grip on appetite and desire; it is, as the tradition frames it, a discipline of the soul as much as the body. And modern research on intermittent fasting has since documented benefits — for inflammation, metabolic health, and cognitive function — that the Prophet ﷺ was, in effect, gaining twice a week for fourteen centuries before the studies arrived. The Sunnah rewards both worlds at once.
How to Actually Sustain It
Start with one day, then build. You do not have to begin with both days. Start with Mondays, or with a single day whenever you can manage it, and let the habit establish itself before adding the second. Consistency in a little is more beloved to Allah ﷻ than an ambitious start that collapses (Bukhari 6464). One sustained fasting day a week is a real and lasting achievement.
Anchor it with a proper suhoor. The Prophet ﷺ said: “Take suhoor, for in suhoor there is blessing.” (Bukhari 1923). The pre-dawn meal is what makes the day manageable; skipping it makes the fast far harder than it needs to be. A simple, sustaining suhoor — the prophetic favourites of dates and water among them — is the single most practical support for keeping the fast.
Plan the day around it. A voluntary fast is far easier when the day is arranged with it in mind: lighter commitments where possible, hydration well managed at suhoor and iftar, and an awareness that the early afternoon is usually the hardest stretch. Knowing the difficult hours in advance, and that they pass, makes them easier to ride out.
Keep the intention and the purpose in view. The niyyah for a voluntary fast can be made even after dawn, provided one has not eaten — a mercy that allows a spontaneous fast. And holding the purpose in mind — that this is the Prophet’s ﷺ own practice, that your deeds are being presented today, that Allah ﷻ Himself keeps the reward of the fast — turns hunger from mere abstinence into conscious worship, which is far easier to sustain than a fast emptied of meaning.
What Breaks and What Preserves the Fast
A little practical knowledge removes much of the uncertainty that makes people hesitant to take up voluntary fasting. The fast runs from the entry of dawn (Fajr) to sunset (Maghrib), during which one abstains from food, drink, and marital relations. It is broken deliberately by eating or drinking; it is not broken by things one cannot help — forgetfully eating or drinking does not break the fast, as the Prophet ﷺ said the one who forgets and eats should complete his fast, “for Allah ﷻ has fed him and given him drink” (Bukhari 1933). Rinsing the mouth, brushing the teeth, unavoidable swallowing of saliva, and the like do not break it. The fast is opened at Maghrib — the Sunnah is to hasten to break it, traditionally with dates and water, and to make du‘a at that moment, for the Prophet ﷺ taught that the fasting person has, at the breaking of the fast, a du‘a that is not refused (Ibn Majah 1753). Knowing these simple boundaries turns a vague, intimidating idea into a clear and manageable act.
A Note of Balance
The Sunnah is always balanced, and voluntary fasting is no exception. The Prophet ﷺ forbade the extremes of continuous fasting and praised moderation, reminding even his most zealous Companions that the body has a right over them (Bukhari 1975). This fast is a recommended good, not an obligation, and it should be taken up in a way that strengthens rather than depletes. Those for whom fasting is genuinely difficult or unsafe — through illness, pregnancy, breastfeeding, medication, or a history of disordered eating — are not only excused but should not undertake it, and no one should push their body into harm in pursuit of a voluntary reward. Approached with balance, though, fasting two days a week is one of the most rewarding, sustainable, and quietly life-shaping Sunnahs available — a weekly reset for body and soul that the Prophet ﷺ kept his whole life.
Fasting Mondays and Thursdays is the Prophet’s ﷺ own weekly rhythm — immense in reward, a training of the soul, and, it turns out, a gift to the body too. Start with one day, anchor it with suhoor, plan the day around it, and keep its purpose in view, taking it up with balance rather than strain. For the reasons behind the practice, return to the original article on fasting Mondays and Thursdays.
Frequently Asked Questions
Why did the Prophet ﷺ fast on Mondays and Thursdays?
He gave two reasons. Of Monday: “That is a day on which I was born, and on which I was sent with revelation” (Muslim 1162). Of both days: “Deeds are presented to Allah ﷻ on Mondays and Thursdays, and I like my deeds to be presented while I am fasting” (al-Tirmidhi 747). He wished to be found in worship on the days his record was shown to Allah ﷻ.
How do I start fasting Mondays and Thursdays?
Start with one day — often Monday — and let the habit settle before adding the second, since consistency in a little is more beloved than an ambitious start that collapses (Bukhari 6464). Anchor the fast with a proper suhoor (“in suhoor there is blessing,” Bukhari 1923), plan lighter commitments into the day, and keep the purpose in view to make hunger into conscious worship.
What are the rewards of voluntary fasting?
Immense. The Prophet ﷺ said whoever fasts a day for Allah’s ﷻ sake has his face distanced from the Fire by seventy years (Bukhari 2840). In a hadith qudsi, Allah ﷻ says of fasting: “It is for Me, and I shall reward it” (Bukhari 1904), keeping its reward with Himself. Fasting also trains the nafs in restraint — a discipline of the soul as much as the body.
Is there a health benefit to fasting twice a week?
Modern research on intermittent fasting has documented benefits for inflammation, metabolic health, and cognitive function — effects the Prophet ﷺ was in effect gaining twice a week for fourteen centuries before the studies. The Sunnah rewards both worlds: worship and the training of the soul, alongside a weekly physical reset. It should still be undertaken with balance, not strain.
Who should not fast Mondays and Thursdays?
This is a recommended Sunnah, not an obligation, and it should strengthen rather than deplete. Those for whom fasting is genuinely difficult or unsafe — through illness, pregnancy, breastfeeding, medication, or a history of disordered eating — are excused and should not undertake it. No one should push their body into harm for a voluntary reward; the Sunnah is always balanced, and the body has a right over you (Bukhari 1975).