The history of the birthday parties begins around 3,000 B.C. in ancient Egypt, where Egyptians celebrated the birth of pharaohs as "gods".
Sometime after Egyptians had created the concept of birthdays, around 550 to 400 B.C., Greece had adopted the idea, and began celebrating birth with means of protection against evil spirits, which were believed by this pagan culture to be more present on birthdays.
Because birthday party's beginnings were tied to pagan cultures, Christians believed to practice such a tradition would be blasphemy. So it was not until after 300 A.D. when Christmas was celebrated in honor of the birth of Jesus Christ.
The birthday party had now become widespread, and been taken in by almost all cultures and modified to fit their ideologies. Once this idea of celebrating birth hit Germany, they created the style of birthday parties most practiced today, known as kinderfeste, which translates to "children's party" in German.
Even though the changing of the birthday party might have seemed to peak after the creation of kinderfeste, the accessibility of birthday parties did not. The Industrial Revolution was a time of great improvement in both affordable goods inventory and mass production technologies. Together, these two factors helped lower the cost of birthday cakes, making birthday celebrations available to a wider range of people.
The final piece of the birthday puzzle comes when in 1893, two Kentucky school teachers, Patty and Mildred Hill, compose the original birthday song melody, but with the lyrics "Good Morning to All". Later, however, in 1924, Robert Coleman rewrote the lyrics to the same tune, creating "The Birthday Song". After its featuring in an Irving Berlin musical, the Hill sisters sued for the copyrights to the song, and to this day receive an estimated $2 million per year in music licensing fees.