We have been listening that shab e baraat i.e 15th of shaban has many significance like that its fast’s reward will be same like as of 80 years of fasts, that this is the day when all the humans’ lives and deaths are decided, that it is a very good day to visit the graveyard. Please let me know is there any authentic hadees or Quran ayat which proves this day’s significance, which leads us to offer some special prayers on this shab, other than the wilaadat of our Imam Mehdi (A.S)

These are all recommended amal mention in Mafateeh ul Jinan in amal of 15 shaban and also collected in duas.org. InshaAllah it will help you