A more thorough explanation:

A birthday club is a type of gifting club where members exchange gifts on each other's birthdays.

For example, a group of friends may form a birthday club where each member is assigned a month. On their assigned month, the member receives gifts from the other members of the club.

This type of club is a fun way to celebrate birthdays and show appreciation for friends and loved ones. It also helps to spread out the cost of gift-giving throughout the year.