What is the understanding of scholars regarding the last ten nights and the variation of Laylat al-Qadr among the odd nights, based on the Quran and Sunnah? And can a person experience Laylat al-Qadr twice in one Ramadan when traveling between two countries where the moon sighting differs, and two consecutive odd nights happen to be Laylat al-Qadr in them? And how are the odd and even nights determined in the last ten nights?

Laylat al-Qadr is in the last ten nights of Ramadan, specifically on the odd nights, but it could also be on the even nights when considering what remains of the month. To calculate Laylat al-Qadr, one can look at the odd nights (21st, 23rd, 25th, 27th, 29th) or by what remains of the month (the ninth remaining, the seventh remaining, the fifth remaining). Therefore, it is preferable to perform voluntary prayers throughout all of the last ten nights to attain it. Laylat al-Qadr is a single night, and the difference in the start of the month between countries does not mean there are two nights. It could be an odd night in one country and an even night in another due to the difference in moon sightings, which emphasizes the importance of reviving all of the last ten nights in worship.