Today our Muslim friends celebrate Lailat Al-Qard
Laylat Al Qadr is considered the holiest night of the year for Muslims, and is traditionally celebrated on the 27th day of Ramadan. It is known as the "Night of Power," and commemorates the night that the Quran was first revealed to the Prophet Muhammad, beginning with the exhortation, "Read! In the Name of your Lord, Who has created (all that exists)," in Surat Al-Alaq (Muhsin Khan translation).
For more Information on this holiday, check out the following link