" When (the month of) Ramadan begins."
Sahih Muslim Book 13, Hadith 3
← Previous Hadith Abu Huraira reported Allah's Messenger (ﷺ) as saying: When it is the month of Ramadan, the gates of mercy are opened, and the gates of Hell are locked and the devils are chained.

Sahih Muslim Book 13, Hadith 2 Next Hadith → Do not fast till you see the new moon, and do not break fast till you see it; but if the weather is cloudy calculate about it.

Sahih Muslim Book 13, Hadith 4