Lailat-ul-Meraj also known as Shab-e-Meraj is a glorious night, marking the Isra and Miraj of Prophet (PBUH) when he was taken from Makkah to Al-Haram-Al-Sharif, inside Al-Aqsa Mosque (also known as Baitul Muqaddas) and then ascended to highest stages of heaven.
