The Holiday of Pesach which commemorates the liberation of the Jewish people from Egypt has often been referred to as the birthday of the Jewish nation.

The prophet Yechezkel expressed this analogy quite graphically:

"And as for your birth, on the day you were born...."

Rashi explains that because the Exodus was seen as the birth of the Jewish people the prophet speaks metaphorically of the Exodus in the terms of a newborn baby (See Yechezkel 16:4ff).