Birthday celebrations are a significant human custom, marking the annual passage of an individual's birth date. These events often include gatherings of friends and family members, who partake in various activities such as gift-giving, enjoying special food, and participating in entertainment. Birthdays also hold cultural and symbolic significance, with certain milestones carrying specific meanings. Overall, this tradition fosters social bonds and provides an opportunity for individuals to reflect on their personal growth.
You are an alien historian visiting Earth. Write a brief report on the human tradition of celebrating birthdays.