Salaam. I need a quick answer. Can a person make an intention before dahwatul Kubra for a qadha fast? Or is tabyeet necessary?
بسم الله الرحمن الرحيم
In The Name Of Allah, The Most-Gracious, The Most-Merciful
The obligatory fasts fall into two types:
1- The obligatory fast associated with a specified time – such as the fast of Ramadan – these fasts can have their intention formed the previous night, until the Islamic midday (dahwatul kubra- midpoint between sunrise and sunset), although making the intention before fajr is better.
2- The obligatory fast not associated with a specified time – such as the qadaa fast of Ramadan or kaffarah – these fasts need to have an intention formed from the previous night. This is because they are non-specific to a certain time and therefore they must be specified before being started.
Therefore, in order for you to fast a qadha fast, it would require that you make intention from the previous night before fajr commences.
Only Allah knows best
Written by Alimah Nasima Umm Hamza
Checked and approved by Mufti Mohammed Tosir Miah
Darul Ifta Birmingham
1 Al-Hidayah, Imran Nyazee Translation, Volume 1, Pages 351-35