The White Days are the 13th, 14th, and 15th of every Hijri month — days many Muslims fast. This page lists their expected Gregorian dates for this month and the months ahead.
Short answer
The White Days recur every Hijri month on the 13th, 14th, and 15th. For Rabi al-Awwal 1448 AH they are expected on 26 Aug 2026, 27 Aug 2026, and 28 Aug 2026 — the live table below confirms them in your browser.
±1 day · Dates on this page are astronomical (Umm al-Qura) estimates. Dates your community actually observes — especially around Ramadan and the Eids — can differ by a day based on local moon sighting.
Expected 26 Aug 2026
This month and next, computed live
Your browser works out the current and next Hijri month with the same Umm al-Qura calendar the Hijri converter uses, then lists each month's 13th, 14th, and 15th with their weekdays:
The months ahead
Expected White Days dates for the coming Hijri months, generated 2026-08-24 from the Umm al-Qura calculation:
White Days expected dates for the coming Hijri months
Hijri month
13th
14th
15th
Rabi al-Awwal 1448 AH
26 Aug 2026
27 Aug 2026
28 Aug 2026
Rabi al-Thani 1448 AH
24 Sep 2026
25 Sep 2026
26 Sep 2026
Jumada al-Ula 1448 AH
24 Oct 2026
25 Oct 2026
26 Oct 2026
Jumada al-Akhirah 1448 AH
23 Nov 2026
24 Nov 2026
25 Nov 2026
Rajab 1448 AH
22 Dec 2026
23 Dec 2026
24 Dec 2026
Sha'ban 1448 AH
21 Jan 2027
22 Jan 2027
23 Jan 2027
Ramadan 1448 AH
20 Feb 2027
21 Feb 2027
22 Feb 2027
Shawwal 1448 AH
21 Mar 2027
22 Mar 2027
23 Mar 2027
All dates are Umm al-Qura estimates and can shift by a day with local moon sighting. Generated 2026-08-24.
How the dates are set
The Hijri month begins with the birth of the new moon and runs 29 or 30 days, so its middle days — the 13th, 14th, and 15th — always carry a full or nearly full moon. A Hijri year of twelve such months is 354 or 355 days, about 11 days shorter than the Gregorian year, which is why each month's White Days land about eleven days earlier than the month before them in Gregorian terms.
The Gregorian dates here come from the Umm al-Qura calculation — the official Islamic calendar of Saudi Arabia and the calendar this site's Hijri calendar converter uses. Communities that set months by physical moon sighting keep the same Hijri dates but may begin the month a day later, shifting their White Days by a day. As always with Hijri dates: plan by estimate, confirm by announcement.
Frequently asked questions
What are the White Days?
The 13th, 14th, and 15th of each Hijri month — days many Muslims fast. They fall in the middle of the lunar month, when the moon is at its fullest and the nights brightest, which gives them their Arabic name, Ayyam al-Bid (the white days).
When are the White Days this month?
For Rabi al-Awwal 1448 AH, they are expected on 26 Aug 2026, 27 Aug 2026, and 28 Aug 2026. The live table at the top recomputes them in your browser from the Umm al-Qura calendar.
Do the White Days change every month?
They are fixed in the Hijri calendar (13–15 of every month), so their Gregorian dates shift with each lunar month — about 29.5 days apart, and about 11 days earlier each Gregorian year.
