Solar Day
The time it takes for the sun to return to the same position in the sky. It takes 24 Hours.
img:http://static.memrise.com/uploads/mems/473013000120428214602.png
Point two is the Earth after 360 degrees but as you can see it has moved around the earth a bit by then so it has to turn on its axis a bit more. Hence the extra 4 minutes when compared to the sidereal day.
by
Calum1