The Holy Prophet (S.A.W.W.) had said that during the night of 15th Sha’baan, the Almighty takes decisions in the matters of:
1). Sustenance 2). Life and death 3). Welfare of the people.
Next to the “Night of Qadr” the Night of 15th Sha’baan is the most auspicious night (also known as “Night of Bara’at”).