The Holy Lailatul Qadr or Shab-e-Qadr, the holiest and most blessed night for Muslims is being observed tonight.
Lailatul Qadr, the night of achieving qadr is mostly observed on 27th Ramadan.
It is also revered, as the day of revealation of the Holy Quran. However, according to Islamic theology, the Qadr happens on an odd-numbered night of last 10 days of Holy Ramadan.