August 15 is the 227th day of the year (228th in leap years) in the Gregorian calendar. 138 days remain until the end of the year.
- 1852 - Angry Bábís (acting on their own volition) make a failed attempt to kill Nasser al-Din Shah
- 1864 - Díyá'u'lláh is born to Fátimih and Bahá’u’lláh.
