✅Answer: The night of the 15th of Sha'ban, apart from the honor of the birth of Baqiyyatullah (the remaining of Allah, peace be upon him), has its own honor, importance, and specific acts. Please pay attention to a few of them:

1 Abu Yahya al-Sana'ani narrated from 30 trustworthy people from Imam Sadiq and Imam Baqir (peace be upon them) that they said:

When the night of the 15th of Sha'ban comes, pray four rak'ahs (i.e., two sets of two rak'ahs), and in each rak'ah, recite Surah al-Hamd and one hundred times Surah al-Ikhlas (Qul Huwa Allahu Ahad). Then, when you finish the prayer, say:

اللَّهُمَّ إِنِّی إِلَیْکَ فَقِیرٌ وَ مِنْ عَذَابِکَ خَائِفٌ مُسْتَجِیرٌ اللَّهُمَّ لَا تُبَدِّلِ اسْمِی وَ لَا تُغَیِّرْ جِسْمِی وَ لَا تُجْهِدْ بَلَائِی وَ لَا تُشْمِتْ بِی أَعْدَائِی أَعُوذُ بِعَفْوِکَ مِنْ عِقَابِکَ وَ أَعُوذُ بِرَحْمَتِکَ مِنْ عَذَابِکَ وَ أَعُوذُ بِرِضَاکَ مِنْ سَخَطِکَ وَ أَعُوذُ بِکَ مِنْکَ جَلَّ ثَنَاؤُکَ أَنْتَ کَمَا أَثْنَیْتَ عَلَی نَفْسِکَ وَ فَوْقَ مَا یَقُولُ الْقَائِلُونَ [فِیک]

📚 Misbah al-Mutahajjid: 577

📚 Iqbal al-A'mal, Vol. 3, p. 314

2 السَّيِّدُ عَلِيُّ بْنُ طَاوُسٍ فِي الْإِقْبَالِ، عَنِ السَّيِّدِ يَحْيَى بْنِ الْحُسَيْنِ فِي كِتَابِ الْأَمَالِي بِإِسْنَادِهِ إِلَى عَلِيٍّ قَالَ قَالَ رَسُولُ اللَّهِ مَنْ صَلَّى لَيْلَةَ النِّصْفِ مِنْ شَعْبَانَ مِائَةَ رَكْعَةٍ بِأَلْفِ مَرَّةٍ قُلْ هُوَ اللَّهُ أَحَدٌ لَمْ يَمُتْ قَلْبُهُ يَوْمَ يَمُوتُ الْقُلُوبُ وَ لَمْ يَمُتْ حَتَّى يَرَى مِائَةَ مَلَكٍ يُؤْمِنُونَهُ مِنْ عَذَابِ اللَّهِ ثَلَاثُونَ مِنْهُمْ يُبَشِّرُونَهُ بِالْجَنَّةِ وَ ثَلَاثُونَ كَانُوا يَعْصِمُونَهُ مِنَ الشَّيْطَانِ وَ ثَلَاثُونَ يَسْتَغْفِرُونَ لَهُ آنَاءَ اللَّيْلِ وَ النَّهَارِ وَ عَشَرَةٌ يَكِيدُونَ مَنْ كَادَهُ

📚 Al-Iqbal, Vol. 3, p. 322

📚 Mustadrak, Vol. 6, p. 285

Sayyid ibn Tawus, in the book 'Iqbal al-A'mal,' narrated from Yahya ibn Hussein in the book 'Amali' with his chain of narrators from Ali (peace be upon him) that the Messenger of Allah (peace be upon him and his family) said: He who prays one hundred rak'ahs on the night of the 15th of Sha'ban with one thousand recitations of 'Qul Huwa Allahu Ahad,' his heart will not die on the day hearts die, and he will not pass away until he sees one hundred angels who give him protection from the punishment of Allah, with 30 of them giving him glad tidings of Paradise, 30 of them protecting him from Satan, 30 of them seeking forgiveness for him during the hours of the night and day, and 10 of them plotting (against) those who plot against this person.

3 بِإِسْنَادِهِ إِلَی مَوْلَانَا عَلِیٍّ علیه السلام قَالَ قَالَ النَّبِیُّ صلی الله علیه و آله: إِذَا کَانَ لَیْلَةُ النِّصْفِ مِنْ شَعْبَانَ فَقُومُوا لَیْلَهَا وَ صُومُوا نَهَارَهَا فَإِنَّ اللَّهَ یَنْزِلُ فِیهَا لِغُرُوبِ الشَّمْسِ إِلَی السَّمَاءِ فَیَقُولُ أَ لَا مُسْتَغْفِرٌ فَأَغْفِرَ لَهُ أَ لَا مُسْتَرْزِقٌ فَأَرْزُقَهُ حَتَّی یَطْلُعَ الْفَجْرُ.

📚 Iqbal al-A'mal, Vol. 3, p. 323

Ali (peace be upon him) narrated from the Messenger of Allah (peace be upon him and his family) that he said: When the night of the 15th of Sha'ban comes, then stand up (i.e., stay awake) during its night and fast during its day, because the Lord's (command and messenger) descends to the heavens from the sunset and says: 'Is there any seeker of forgiveness whom I may forgive? Is there any seeker of sustenance whom I may provide for?' until the dawn breaks.

اللَّهُمَّ صَلِّ عَلَی مُحَمَّدٍ وَ آلِ مُحَمَّدٍ وَ عَجِّلْ لِوَلِیِّکَ الْفَرَجَ وَ الْعَافِیَةَ وَ النَّصْرَ