In contrast, for voluntary fasts (such as those on Mondays and Thursdays or the six days of Shawwal), the window for Niyat is more lenient. A person can make the intention to fast a voluntary fast any time before midday, provided they have not already committed an act that breaks the fast since dawn. This distinction emphasizes the sanctity and mandatory nature of Ramadan, requiring a higher level of spiritual preparation and commitment compared to voluntary acts.
The Essence of Nombu Niyat: The Intention Behind the Fast nombu niyat