White days (Ayyam al-Bid) dates
For anyone who fasts the white days each month: the tool shows the nearest three white days from the date you pick, with each weekday.
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Processing and privacy: The result is calculated inside your browser and your data is not sent to any server.
How to use it
- Enter from date.
- The result appears straight away and updates as you edit.
- Copy the result, or copy a link that keeps the same values to share it.
How it is calculated
The date is converted to Umm al-Qura. If the Hijri day is 15 or less, the current month is used, otherwise the next month. Each white day = the Gregorian date of the 13th, 14th and 15th of that month in the Umm al-Qura table.
Example
Inputs: From date = 2026-09-30. Result: First white day (the 13th): Saturday, 24 October 2026 (2026-10-24); Hijri month: Jumada al-Ula 1448 AH; The 14th: Sunday, 25 October 2026 (2026-10-25).
Limits and caveats
- Dates come from Umm al-Qura; if your country starts the month by sighting on another day, the white days shift by a day with it.
- The Hijri day starts at sunset; the tool shows the Gregorian day you would fast.
- The tool gives dates only; for fasting rulings ask a qualified scholar.
Questions about this tool
What are the white days?
They are the 13th, 14th and 15th of every Hijri month, named white because their nights are lit by a nearly full moon.
What about the white days in Dhu al-Hijjah?
The 13th of Dhu al-Hijjah is a Tashreeq day when fasting is not allowed, so the tool warns you when the month is Dhu al-Hijjah.
Why do their Gregorian dates change every month?
A Hijri month has 29 or 30 days, so the white days come a day or two earlier in each Gregorian month, and the table lists them for a full year.