No firm hadeeth exists

Reference: https://twitter.com/kradd2/status/986755448765403141

No firm hadeeth exists to support the virtue of the night of 15th of Sha’baan.

Reference: al-Baa’ith li-Abee Shaamah

Abul-Khattaab ibn Dahiyyah said:

The scholars of hadeeth said “there is no hadeeth related to the [virtue of the night of] 15th of Sha’baan which is authentic.”

Reference: Lataa.if al-Ma’aarif

Ibn Rajab said:

And there are numerous ahaadeth related to the virtue of the night of 15th of Sha’baan, and they (the scholars of hadeeth) have differed [in their opinion] regarding them; and most of them have declared them to be weak.

Abu 'Abdullaah

- from London, UK. He is a graduate of the Islaamic University of Madeenah, having graduated from the Institute of Arabic Language, and later the Faculty of Sharee'ah in 2004.