White Days (Ayyam al-Bid) 1448: Fasting Dates for Every Month

The White Days — al-Ayyam al-Bid (الأيام البيض) — are the 13th, 14th and 15th of every Hijri month. Fasting them is one of the easiest regular Sunnah fasts to build into a routine: three days a month, at a predictable point in the lunar cycle. The only difficulty is knowing when they fall in the Gregorian calendar, which is what this guide is for.

All dates below use the Umm al-Qura calendar. If your community starts its months by local sighting, the dates may be a day later.

White Days 1448 AH: every month

Hijri month	13th	14th	15th
Muharram 1448	Sun 28 Jun 2026	Mon 29 Jun	Tue 30 Jun
Safar 1448	Mon 27 Jul 2026	Tue 28 Jul	Wed 29 Jul
Rabi’ al-Awwal 1448	Wed 26 Aug 2026	Thu 27 Aug	Fri 28 Aug
Rabi’ al-Thani 1448	Thu 24 Sep 2026	Fri 25 Sep	Sat 26 Sep
Jumada al-Ula 1448	Sat 24 Oct 2026	Sun 25 Oct	Mon 26 Oct
Jumada al-Akhirah 1448	Mon 23 Nov 2026	Tue 24 Nov	Wed 25 Nov
Rajab 1448	Tue 22 Dec 2026	Wed 23 Dec	Thu 24 Dec
Sha’ban 1448	Thu 21 Jan 2027	Fri 22 Jan	Sat 23 Jan
Ramadan 1448	(within Ramadan)	—	—
Shawwal 1448	Sun 21 Mar 2027	Mon 22 Mar	Tue 23 Mar
Dhul-Qa’dah 1448	Tue 20 Apr 2027	Wed 21 Apr	Thu 22 Apr
Dhul-Hijjah 1448	Wed 19 May 2027 ✗	Thu 20 May	Fri 21 May

✗ = 13 Dhul-Hijjah is a Day of Tashreeq; fasting on it is not permitted. See the note below.

Remember that the Islamic day begins at sunset: if you plan to wake for suhoor, you make your intention on the night before the date listed.

Early 1449 AH

For planning ahead, the first months of the next Hijri year:

Hijri month	13th	14th	15th
Muharram 1449	Fri 18 Jun 2027	Sat 19 Jun	Sun 20 Jun
Safar 1449	Sat 17 Jul 2027	Sun 18 Jul	Mon 19 Jul
Rabi’ al-Awwal 1449	Sun 15 Aug 2027	Mon 16 Aug	Tue 17 Aug
Rabi’ al-Thani 1449	Tue 14 Sep 2027	Wed 15 Sep	Thu 16 Sep

Why they are called “white”

On the 13th, 14th and 15th nights of a lunar month, the moon is full or nearly full, so the nights are bright — “white”. Some scholars mention a second explanation from Arabic usage, that the days themselves were called white because of the bright nights that precede them. Either way, the name ties the fast to the visible moon, which is exactly how the Hijri calendar works.

The evidence for fasting them

Several hadith encourage fasting three days a month and identify the White Days as the preferred three:

• Abu Hurayrah said: “My close friend ﷺ advised me to do three things: to fast three days of every month, to pray two rak’ahs of Duha, and to pray witr before I sleep.” (Sahih al-Bukhari 1981; Sahih Muslim 721)
• Abu Dharr reported that the Prophet ﷺ said: “If you fast three days of the month, then fast the 13th, 14th and 15th.” (Sunan al-Tirmidhi 761; graded hasan by al-Tirmidhi)
• The Prophet ﷺ explained the reward: “Fasting three days of every month is like fasting for a lifetime.” (Sahih al-Bukhari 1979) — because each good deed is multiplied tenfold, three days become thirty.

From these, scholars conclude that fasting any three days a month is Sunnah, and that the 13th–15th are the best choice when possible. Imam al-Nawawi notes in al-Majmu’ that the reward of three days is achieved whichever days are fasted, while the White Days are preferred.

The Dhul-Hijjah exception

In Dhul-Hijjah, the 11th, 12th and 13th are the Days of Tashreeq, which follow Eid al-Adha. The Prophet ﷺ described them as “days of eating, drinking and remembering Allah” (Sahih Muslim 1141), and fasting on them is not permitted for anyone not performing Hajj under specific conditions.

So the 13th of Dhul-Hijjah cannot be fasted. Scholars suggest two common solutions:

1. Fast the 14th and 15th (20 and 21 May 2027), plus another day later in the month.
2. Fast any three other days in Dhul-Hijjah — for example, days you have already fasted among the first nine, such as the Day of Arafah on 15 May 2027.

Either way, the general Sunnah of three days a month is fulfilled.

And Ramadan?

In Ramadan, the 13th, 14th and 15th are already obligatory fasts, so there is no separate White Days fast to perform. Scholars do not ask anyone to “make up” the White Days of Ramadan.

Practical tips

Set a monthly reminder at the 12th. Because the dates shift by about 11 days every Gregorian year, a fixed reminder in your phone will drift. Instead, note the Gregorian dates for the next few months from the table above, or check the Hijri date on the home page at the start of each month.

Plan around weekends and work. Look at the weekdays in the table. If the White Days fall on a heavy work week, consider fasting two of them plus a Monday or Thursday — those days have their own Sunnah of fasting.

Combine intentions wisely. If you are making up missed Ramadan fasts, many scholars allow you to fast them on the White Days and hope for the reward of both; others recommend keeping them separate. If in doubt, prioritise the obligatory make-up fasts.

Expect a day’s difference. If your mosque follows local sighting, its 13th may be a day after the Umm al-Qura 13th in this table. Follow your community’s calendar; the reward is not lost by a day’s difference in method.

Ease in. For people new to voluntary fasting, the White Days are an ideal start — three days, close together, with a clear purpose. Many people find that fasting regularly through the year makes Ramadan noticeably easier.

Other Sunnah fasts through the year

The White Days are one of several recommended voluntary fasts. Together they make a simple yearly rhythm:

Fast	When	Evidence
White Days	13–15 of every Hijri month	Sunan al-Tirmidhi 761
Mondays and Thursdays	Every week	Sunan al-Tirmidhi 747 — deeds are presented on these days
Six days of Shawwal	Any six days after Eid al-Fitr	Sahih Muslim 1164
Day of Arafah	9 Dhul-Hijjah (15 May 2027)	Sahih Muslim 1162
Ashura (with the 9th)	9–10 Muharram (14–15 June 2027)	Sahih Muslim 1162, 1134
Much of Sha’ban	The month before Ramadan	Sahih al-Bukhari 1969
Fast of Dawud	Every other day — the most beloved voluntary fast	Sahih al-Bukhari 1131

There is no need to attempt all of them. Many people find that the White Days plus Mondays and Thursdays make a sustainable routine.

How to work out the White Days yourself

If you are reading this in a later year, the method is simple:

1. Find 1st of the Hijri month in the Gregorian calendar (from a calendar such as our Hijri calendar page).
2. Add 12 days for the 13th, 13 for the 14th and 14 for the 15th.
3. Check the weekday and plan your suhoor for the night before each date.

For example, Jumada al-Ula 1448 begins on 12 October 2026. Add 12 days: 24 October is the 13th.

Summary

• The White Days are the 13th, 14th and 15th of every Hijri month.
• Fasting them is a recommended Sunnah, rewarded like fasting a lifetime when done every month.
• In Jumada al-Ula 1448 they fall on 24–26 October 2026.
• In Dhul-Hijjah, skip the 13th (a Day of Tashreeq) and fast the 14th, 15th and another day.
• Check your community’s calendar — local sighting can move them by a day.