It is believed that the axis of the temple at Abu Simbel was positioned by the ancient Egyptian architects in such a way that on October 22 and February 20, the rays of the sun would penetrate the sanctuary and illuminate the sculptures on the back wall, except for the statue of Ptah, the god connected with the Underworld, who always remained in the dark. Due to the displacement of the temple and/or the accumulated drift of the Tropic of Cancer during the past 3,280 years, it is widely believed that each of these two events has moved one day closer to the Solstice, so they would be occurring on October 22 and February 20 (60 days before and 60 days after the Solstice, respectively). Source
Outside the Great Temple of Abu Simbel, a long line of people are waiting for a first chance to glimpse the sun's rays as they fall on the faces of the statues of Pharaoh Ramses II, and the gods of creation and light, Ptah, Amen and Heru-khuti. At exactly 6:20 AM, the first beams of light fall on the sanctuary. The Abu Simbel Sun Festival occurs biannually, on 22 October and 22 February, dates on which the sun shines directly into the temple's sanctuary. Read more
Ed ~ The annual celebration of the perpendicular sun fall on the face of Pharaoh Ramses II statue in Abu Simbel Temple in Luxor takes place in on the 22nd October.