When the Prophet ﷺ saw the new crescent, he said Allahumma ahlilhu alayna bil-yumni wal-iman, was-salamati wal-islam, rabbi wa rabbukallah: O Allah, bring it over us with blessing and faith, safety and Islam. My Lord and your Lord is Allah.1 It is said at the start of every Islamic month, not only Ramadan.
اللَّهُمَّ أَهْلِلْهُ عَلَيْنَا بِالْيُمْنِ وَالْإِيمَانِ، وَالسَّلَامَةِ وَالْإِسْلَامِ، رَبِّي وَرَبُّكَ اللَّهُ
Allāhumma ahlilhu ʿalaynā bil-yumni wal-īmān, was-salāmati wal-islām, rabbī wa rabbukallāh
O Allah, bring it over us with blessing and faith, with safety and Islam. My Lord and your Lord is Allah.
Jami at-Tirmidhi 3451, from Talhah ibn Ubaydullah, graded hasan
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Guide
When the Prophet ﷺ saw the new crescent, he said Allahumma ahlilhu alayna bil-yumni wal-iman, was-salamati wal-islam, rabbi wa rabbukallah: O Allah, bring it over us with blessing and faith, safety and Islam. My Lord and your Lord is Allah.1 It is said at the start of every Islamic month, not only Ramadan.
Say it when you see the new crescent, usually low in the west just after sunset on the 29th or 30th of the month. The last words, "my Lord and your Lord is Allah", are addressed to the moon: a reminder that it is a creation, not something to be worshipped. A longer version in Sunan al-Darimi begins with Allahu akbar and adds a request for success in what Allah loves, but its chain is weaker.2
The Prophet ﷺ said: "Fast when you see it and end the fast when you see it, and if it is hidden from you, complete Shaban as thirty days."3 To see whether the crescent can be seen in your city tonight, use the moon sighting calculator.
In the main position of the Hanafi school, a sighting confirmed in one place binds Muslims elsewhere once it reaches them reliably, and differences of horizon are not taken into account. Many Hanafi scholars today follow a local or regional sighting committee.
The rulings on this page are pending review by the scholars on our team.
Questions
Allahumma ahlilhu alayna bil-yumni wal-iman, was-salamati wal-islam, rabbi wa rabbukallah (Tirmidhi 3451).
No. The same dua is said for the crescent of every month, including Ramadan and Shawwal.
On the evening of the 29th of the Islamic month, just after sunset, if the sky is clear and the moon is old enough. If not, the month is completed as 30 days.