Question 269) - What do you mean it is allowed in practice but not in each other's times?

A: A joining in practice is to delay Zhuhr and hasten 'Asr. Zhuhr is prayed right at the end of its waqt and 'Asr right at the beginning of its waqt. similarly Maghrib is prayed at the end of its waqt and 'isha at its beginning. This is joining in practice and is called "Jam'Suwari" [joining in Form] in the terminology of the Fuqaha. According to us a salah in the time of the other is not allowed, whether delaying or bringing ahead. That is joining in a Waqt which the Fuqaha call, "Jam' Haqiqi" [Real Joining].

~ al-Quduri ~