Please inform us about the times when the five daily prayers end, and is it permissible to pray the 'Isha' prayer at 12 at night?

Question:
Please inform us about the times when the five daily prayers end, and does every prayer end with the entry of the time of the prayer that follows it, or not? And is it permissible for us to pray the 'Isha' prayer at 12 at night? Please guide us on these issues. May Allah reward you with good.

Answer:
As for the Zuhr prayer, the time begins with the sun passing from the middle of the sky, which is the sun's decline, meaning its passing from the middle of the sky, i.e., its alignment toward the west. It continues until the time of 'Asr enters, which is when the shadow of an object becomes equal to its length at the time of Zuhr. Then the time of 'Asr enters when the shadow of an object becomes equal to its length, and it continues until the setting of the sun. However, it is divided into two parts: the time of choice and the time of necessity. The time of choice is from when the shadow of an object becomes equal to its length until the shadow of an object becomes twice its length; this is the time of choice. As for the time of necessity, it is until the setting of the sun. Then the time of Maghrib enters with the setting of the sun, and it continues until the disappearance of the red twilight. When the red twilight disappears, the time of Maghrib ends, and the time of 'Isha' enters. It continues until the appearance of the dawn, but it is divided into two parts: the time of choice, which is until the middle of the night, and the time of necessity, which is until the appearance of the dawn. When the dawn appears, the time of 'Isha' ends, and the time of Fajr enters. It continues until the rising of the sun. So the time of Fajr is from the appearance of the dawn, which is the white light stretching across the horizon, and it continues until the rising of the sun. Yes. May Allah reward you with good.