  In this paper we discuss the orientation of the Egyptian pyramids at Giza
with respect to sunrises and sunsets, using SunCalc.net software. We can see
that Khufu and Khafre pyramids had been positioned in a manner that, from each
pyramid, it was always possible to observe the points of the horizon where the
sun was rising and setting on each day of the year. A discussion for the
Menkaure pyramid is also proposed.
