Answered by Shaykh Faraz Rabbani
Does one have to wake up and eat at Suhur for a fast to be valid when making up fasts? I know to wake up for suhur is Sunnah and there is a greatness attched to this great act and to make up the missed fast is fardh. So I’ve been keeping them without eating at Suhur.
Walaikum assalam wa rahmatullah,
I pray this finds you in the best of health and spirits.
The pre-dawn meal (suhur) is a recommended sunna, and a means of great blessing–as well as being a means of facilitating one’s fast. [ Ibn Abidin, Radd al-Muhtar; Shurunbulali, Maraqi al-Falah ] However, it is not a condition for the validity of one’s fast. As such, one can perform any kind of fast even if one missed the pre-dawn meal.
And Allah alone gives success.