LEO begins on the 22nd or 23rd of July and lasts until August 23rd or 24th. That, only, sets the boundaries of the Signs not a certain number of days. The SUN is at the center of our Solar System and provides all the light and heat we see. LEO's symbol is the Lion, the King of Beasts.
Lions live in something called a pride and their bellows can be heard all around the land.
A hungry Lion may devour a beast then just lay around it's kill for a couple days and sleep. LEO is associated with the Heart and Back in the human body. The FIRE signs create change in anticipation of the future and it's different needs. Many times the FIRE Signs create change just for the sake of change not understanding the other consequences of the change. LEO may be part of a family as we all are, but thinks of itself, it's own need first.