Making Up Prayers During Forbidden Times

In the name of Allah, Most Compassionate, Most Merciful,

Assalam’aleykum,

I pray this finds you in the best of states.

According to the Hanafi school, there are three times in the day when one is forbidden to offer any prayers, even make-up prayers, which are actually considered invalid if offered at these times.

These times are when the sun rises up until it is above the horizon by the length of a spear (about twenty minutes after sunrise), when the sun is at its zenith (the 5 minutes before Zuhr time) and when the sun turns dull in radiance such that one can look at it until it sets (about twenty minutes to half an hour before sunset). [Shurunbulali, Nur al-Idah]

If you have missed the Fajr prayer, you would have to wait 20 minutes after sunrise in order to make it up validly.

Caution

It is important to avoid bothering other Muslims about this issue as some people may leave the prayer altogether. Praying validly, according to one school of jurisprudence, at least is better than not praying at all. [Shurunbulali, Maraqi al-Falah]