morgist:


Salam Alaikum Brother,
Prophet Muhammad (S.A.W) said that the night of laylatul qadri starts immediately after magrib prayer and ends before subhi prayer. Meaning whenever you pray from magrib to subhi you have the night. but the peak of every night according to Islam is from 2:30am to 4:00am thats when Allah S.W.A descended closer to earth and answers prayers for everyone. And also you can ask for anything in the world and here after. But asking for forgiveness is key.
Regarding the person that stops fasting due to ulcer, that person can still pray, so he can participate. Rasulullah (S.A.W) says even those menstruating and not praying can still participate but they should not pray or fast or take full quran to recite. But they can recite the quran without touching.
ma asallam.

Jazakhulahi khairan brother, thanks for your response

Maa sha Allahu