What do we say about which night Laylatul Qadr is?
Laylatul Qadr can be in any of the last 10 nights of Ramadan. Even more specific than that, it can be in the odd numbered nights.
Ubayy Ibn Ka’b (ra) from the Sahaabah swore by Allah that it’s on the 27th night and this is in the saheeh. This is why people emphasis this night.
Can there be a variable? Is it based on the lunar calendar?
The Islamic month (lunar calendar) is 29 or 30 days. After the 30th day it is automatically the next month.
So, when it says the “odd nights” that’s put into context by sheikh ul Islam (rh). His view to combine between why the Sahaabah mentioned so many different nights is that:
It changes every year
In addition –
We don’t know if the month will be 29/30 days! So, in reality it’s any of the last ten nights.
Ibn Hajr (rh) mentions a large amount of views in fath ul Bari on when it could be and sheikh ul Islam’s view seems strong.
Allah Knows Best