Sunnah Fasting helps a Muslim earn reward through simple voluntary fasts like Monday, Thursday, Ayyam al-Bid, Ashura, Arafah, and six days of Shawwal. These fasts train sabr, protect the heart, and keep worship alive outside Ramadan. This guide explains the best days, intentions, rewards, and easy routines.
What Sunnah Fasting Means in Daily Muslim Life
Sunnah Fasting means voluntary fasting taught or practiced by Prophet Muhammad ﷺ. It is not fard like Ramadan, but it carries great reward and brings the heart closer to Allah. A Muslim who fasts outside Ramadan learns self-control, lowers desires, remembers the poor, and keeps worship active through the whole year.
These fasts are not meant to make life harsh. The Prophet ﷺ loved steady worship, even if it was small. So a person should choose Sunnah fasts that fit health, work, study, family duties, and strength. Some people can fast every Monday and Thursday. Some can begin with three days each lunar month. Some may only fast Ashura, Arafah, and six days of Shawwal. The goal is sincerity, consistency, and following authentic guidance without showing off or harming the body.
Sunnah Fasting on Monday and Thursday
Fasting on Monday and Thursday is one of the most known Sunnah fasting routines. The Prophet ﷺ used to fast these two days and mentioned that deeds are presented on Monday and Thursday. He loved that his deeds be presented while he was fasting. Monday also has another special meaning because the Prophet ﷺ was born on a Monday and revelation began to him on that day.
This routine works well for many Muslims because it spreads worship across the week. Monday gives a clean start, and Thursday prepares the heart before Jumu'ah. If fasting both days is hard, start with one. If work is heavy, choose the easier day. Do not turn a voluntary act into pressure. Eat suhoor, make intention before fasting, protect the tongue, pray on time, and break the fast with gratitude. The real value is not only staying hungry; it is becoming more obedient to Allah.
Ayyam al-Bid: The White Days of Each Lunar Month
Ayyam al-Bid means the white days: the 13th, 14th, and 15th nights of the Islamic lunar month, when the moon is bright. The Prophet ﷺ encouraged fasting three days every month, and many narrations mention these specific days. This makes Ayyam al-Bid a simple monthly routine for people who cannot fast every week.
The reward of fasting three days each month is great because good deeds are multiplied. It is like keeping the habit of fasting alive all year. To follow this Sunnah, check the Hijri calendar, mark the 13th, 14th, and 15th, and prepare early. If you miss Ayyam al-Bid, you may still fast three other days in that month, because the wider Sunnah of three monthly fasts remains. Do not argue over moon-date confusion. Follow a trusted local Islamic calendar and keep the worship calm.
Fasting Six Days of Shawwal After Ramadan
After Ramadan, the six days of Shawwal are a beautiful chance to continue worship. The Prophet ﷺ said that whoever fasts Ramadan and then follows it with six days of Shawwal is like fasting the whole year. This does not mean Shawwal replaces Ramadan. It means Allah gives huge reward through His mercy.
These six fasts may be done together or separately during Shawwal. Many people begin after Eid al-Fitr, because fasting on Eid day itself is not allowed. If someone has missed Ramadan fasts, scholars differ on whether to make up qada first or fast Shawwal first. The safer and stronger habit is to complete missed Ramadan fasts first when possible, then fast six of Shawwal. If time is short or there is a valid concern, ask a trusted scholar. Keep the intention clean and avoid turning the issue into argument.
Fasting on the Day of Arafah
The Day of Arafah is the 9th of Dhul Hijjah. For those not performing Hajj, fasting this day is highly recommended. The Prophet ﷺ mentioned that fasting Arafah expiates sins of the previous year and the coming year. This is one of the greatest Sunnah fasting days in the whole year.
Pilgrims standing at Arafah during Hajj do not fast because they need strength for dua, worship, and the rites of Hajj. For people at home, this fast is a major gift. Prepare for it early. Sleep on time, eat suhoor, reduce useless talk, give charity, and make much dua before iftar. Do not treat Arafah as only a hunger day. Fill it with takbir, istighfar, Quran, salah, and sincere repentance. It is a day to return to Allah with a soft heart.
Fasting Ashura and the Day Before or After It
Ashura is the 10th of Muharram. The Prophet ﷺ fasted this day and encouraged Muslims to fast it. Fasting Ashura is connected to gratitude to Allah, as Musa عليه السلام and Bani Israel were saved from Pharaoh. The Prophet ﷺ also wished to fast the 9th along with the 10th to differ from other communities.
The best practice is to fast the 9th and 10th of Muharram. Some scholars also mention fasting the 10th and 11th if a person misses the 9th. The reward mentioned for Ashura is expiation of the previous year's sins. This refers to minor sins, while major sins need sincere tawbah. Keep the day simple and authentic. Avoid cultural exaggerations, invented rituals, or false stories. Fast it with gratitude, repentance, and love for the Sunnah.
Other Voluntary Fasts Taught in the Sunnah
Sunnah fasting also includes fasting much in Sha'ban. The Prophet ﷺ used to fast many days in Sha'ban, more than in other months outside Ramadan. This prepares the heart for Ramadan and helps a person enter the blessed month with discipline. But fasting should not be used to weaken oneself right before Ramadan if it causes harm.
Another great pattern is the fast of Prophet Dawud عليه السلام: fasting one day and not fasting the next. The Prophet ﷺ described it as the best fast, but it is only for someone strong enough and able to fulfill family, work, and worship duties. Islam does not praise a person for fasting while neglecting rights. Voluntary fasting must remain balanced. Your body has a right, your family has a right, and your worship has a right.
Days When Fasting Is Not Allowed or Not Recommended
Learning Sunnah fasting also means knowing when not to fast. It is haram to fast on Eid al-Fitr and Eid al-Adha. It is also not allowed to fast the days of Tashreeq for most people, except for a specific Hajj-related case. These are days of eating, drinking, remembrance of Allah, and joy.
It is also disliked to single out Friday for fasting without a reason, unless it matches a regular fast such as Ayyam al-Bid, Arafah, Ashura, qada, or a personal routine. The same caution is mentioned about Saturday by some scholars, though there is discussion on the hadith details. The safe path is simple: follow clear Sunnah patterns, avoid doubtful arguments, and ask a scholar when a special case comes up. Voluntary worship should bring ease and obedience, not confusion.
How to Make Intention for Sunnah Fasting
For Sunnah fasting, intention is required, but it does not need to be spoken aloud. Intention is in the heart. You simply know that you are fasting for Allah. Many scholars allow making intention for a voluntary fast during the day, as long as you have not eaten, drunk, or done anything that breaks the fast since dawn.
Still, planning from the night before is better and safer. It helps you wake for suhoor and prepare your day. You may intend a specific fast, such as Monday, Thursday, Ayyam al-Bid, Ashura, Arafah, or Shawwal. Avoid invented verbal formulas that people treat as required. A quiet sincere intention is enough. Also remember that fasting is more than avoiding food. Guard the tongue from lies, backbiting, rude speech, and useless fighting. A clean fast needs a clean heart.
A Simple Sunnah Fasting Routine for Beginners
If you are new to Sunnah fasting, begin small. First, try fasting Arafah, Ashura, and six days of Shawwal. Then add Ayyam al-Bid each month. After that, try Monday or Thursday once a week. If Allah gives strength, you may fast both Monday and Thursday. This step-by-step path is easier than starting too much and quitting quickly.
Use a Hijri calendar, set reminders, and plan suhoor food before sleeping. Keep meals light and halal. Drink enough water at night. Do not make iftar a moment of waste. Break the fast with dates or water, make dua, pray Maghrib, and eat with balance. Women should also plan around menstruation, pregnancy, nursing, and health needs. Anyone with illness should seek medical advice and Islamic guidance. Allah loves worship done with sincerity and wisdom.
Questions and Answers About Sunnah Fasting
What is Sunnah Fasting in Islam?
Which days are best for Sunnah Fasting every week?
What are Ayyam al-Bid and when should I fast them?
Can I combine Sunnah Fasting with qada fasts?
Is it allowed to fast only on Friday?
Do I need to say the intention for Sunnah Fasting out loud?
Conclusion
Sunnah Fasting is a gentle way to keep the heart close to Allah beyond Ramadan. Monday, Thursday, Ayyam al-Bid, Arafah, Ashura, and Shawwal fasts all give Muslims regular chances for reward, sabr, and repentance. Start with what you can maintain, keep your intention sincere, and let these blessed fasts become a steady part of your life.
References
- Sahih Muslim 1162 — Virtue of fasting six days of Shawwal
- Sahih Muslim 1162 — Fasting the Day of Arafah and Ashura
- Jami' at-Tirmidhi 747 — Fasting on Monday and Thursday
- Sahih Muslim 1162 — The Prophet ﷺ was asked about fasting on Monday
- Sunan an-Nasa'i 2420 — Fasting three days of every month
- Jami' at-Tirmidhi 761 — Fasting Ayyam al-Bid
- Sahih al-Bukhari 2004 — Fasting Ashura
- Sahih Muslim 1134 — Intention to fast the 9th with Ashura
- Sahih al-Bukhari 1990 — The fast of Prophet Dawud عليه السلام
- Riyad as-Salihin — Book of Virtues, chapters on voluntary fasting