A birthdate is the specific day, month, and year when a person is born. It is an important piece of information that helps to determine a person's age and can be used for various purposes, such as legal documents, identification, and celebrations like birthdays. In many cultures, a person's birthdate is celebrated annually with a birthday party, where friends and family gather to honor the individual. Additionally, birthdates can be linked to astrological signs, which some people believe influence personality traits and life events.