A "golden birthday" occurs when a person turns the age that matches the day of the month they were born. For example, if someone was born on the 25th of the month, their golden birthday would be when they turn 25 years old. This milestone is often celebrated as a special occasion, marking a unique alignment of age and birth date. Many people choose to celebrate their golden birthday with parties, gifts, or special activities. It is seen as a once-in-a-lifetime event, making it a memorable time for family and friends to come together and honor the individual.