What was Hermes birth story?

The whole story of Hermes' birth is too big an answer for this online resource, but you can find it written in "Hermes the Olympian" a novel by David Rosser, available on Amazon. The basic "facts" are that Zeus was his Father and Maia was Hermes' mother. He was born in a cave on mount Cyllene in Arcadia on the fourth day of the month.