Sources and method

This site exists to give Muslims a reliable guide to one day. These are the rules we follow to keep it reliable.

Our rules

  1. Only authentic narrations as evidence. We quote hadiths graded sahih (authentic) or hasan (sound). Weak narrations appear only on the weak narrations page, clearly marked, or where we explain a disagreement.
  2. Every narration shows its source and grade, with a link to the full text so you can check it yourself.
  3. Grades are attributed. Narrations in Sahih al-Bukhari and Sahih Muslim are authentic by agreement. For other books we name the scholar or edition whose grade we give.
  4. Differences are shown, not hidden. Where the schools of law or qualified scholars differ, we give the main views and who held them, rather than presenting one view as the only one.
  5. Translations are our own. We render the Arabic of the Qur'an and hadith into plain English. A rendering of the Qur'an is not the Qur'an; we always give the Arabic beside it.
  6. This is not a fatwa. For your own situation, ask a qualified scholar you trust.

Hadith collections

  • Sahih al-Bukhari and Sahih Muslim, the two most authentic collections.
  • Sunan Abi Dawud, Jamiʿ at-Tirmidhi, Sunan an-Nasaʾi and Sunan Ibn Majah, with the grades of al-Albani or the Darussalam edition as shown on sunnah.com.
  • Musnad Ahmad, with the grades of Shuʿayb al-Arnaʾut's edition and al-Albani.
  • Muwatta Malik.

Hadith numbers follow the numbering on sunnah.com, which follows Muhammad Fuʾad ʿAbd al-Baqi for Sahih Muslim. Musnad Ahmad numbers follow the Risalah edition.

Explanations and rulings

  • Ibn Kathir, Tafsir al-Qurʾan al-ʿAzim, for the explanation of verses.
  • Ibn Hajar al-ʿAsqalani, Fath al-Bari, the commentary on Sahih al-Bukhari, including on the takbir.
  • An-Nawawi, Sharh Sahih Muslim and al-Majmuʿ, for the rulings of Hajj and fasting.
  • Ibn Rajab, Lataʾif al-Maʿarif, on the virtues of the seasons of the year.
  • Ibn al-Qayyim, Zad al-Maʿad, on the Prophet's ﷺ Hajj.
  • Ibn ʿAbd al-Barr, at-Tamhid, on the Muwatta.

How the dates are calculated

Dates on this site come from the Umm al-Qura calendar, the official calendar of Saudi Arabia, as built into the Unicode calendar data in modern browsers and servers. It is a calculated calendar; the actual start of Dhul Hijjah is announced in Saudi Arabia after the moon is sighted and can differ by a day. Other countries may follow their own moon sighting.

Photo credits

All photos come from Wikimedia Commons and are used under their Creative Commons licences. They have been resized and cropped.

Review

The site was last reviewed on 4 November 2026. We check the dates and practical information for pilgrims before each Dhul Hijjah.

Last reviewed . How we check sources.