A birthdate is the specific day, month, and year when a person is born. It is often used to determine a person's age and can be important for various legal and social reasons, such as eligibility for school or voting. Birthdates are typically recorded on official documents like birth certificates and identification cards. In many cultures, a person's birthdate is celebrated annually with a birthday party or special observances. Some people also believe that birthdates can influence personality traits and life events, leading to the practice of astrology, which assigns meanings based on the position of celestial bodies at the time of birth.