It was obligatory upon every individual (Waajib 'Ayni) in...

It was obligatory upon every individual (Waajib 'Ayni) in the presence of the Prophet, the Blessings of Allah be upon him and his family (and obligatory in the times) of the Infallible Imam, peace be upon him, and his specific representative. As for the time of the concealment of the Imam (Ghaibatul-Kubra), then it is an elective obligation, meaning, that people can choose between the Friday Prayer and the Noon Prayer.

However, the precaution is not to abandon its performance in the time of a just Islamic government. Timings of The Five Daily Prayers The time of the Noon Prayer and the Late Afternoon Prayer Issue 290: The time of the Noon prayer and the Afternoon is from the legal beginning of Zuhr. The legal beginning of Zuhr is the decline of the sun from its apex in the sky toward to the place of setting until the time of the setting of the sun.

The best manner of ascertaining the entrance of the time of Zuhr is to use a stick or a piece of metal planted firmly in the ground. When the sun shines in the morning, this stick will caste a shadow on the earth toward the west. As the sun rises toward the center of the sky, the shadow will decline. At the time when the shadow reaches the final stage of decline, it is the time of Zuhr.

At the time when (the shadow) begins to increase toward the east, it is the beginning of the time of the Noon Prayer and the Afternoon Prayer in the likes of Makkah Mukarramah and cities similar to it, where the shadow dwindles in some days, the time of Zuhr is at the end (of Zawaal). The sun shines upon the earth from overhead as in this region, when the shadows increases and spreads toward the east, it is the time of the Noon Prayer and the Afternoon Prayer.

The Time of The Evening Prayer and the Night Prayer Issue 291: Maghrib (post sunset) is achieved with the concealment of the disk of the sun behind the horizon. The precaution is to wait until the redness of the eastern horizon disappears which appears after sunset above the head proceeds toward the west. This time is appointed for the Evening and Night Prayers and this time continues until half of the night has expired.

Issue 292: The end time of the Night prayer is at half of the night (According to obligatory precaution, half the night is calculated from the beginning of sunset until the Azaan of Morning Prayer and half the night is half of this period).