I was searching for a fast and easy solution to keep all birthdays in one place. I do have a calendar in the cloud, but due to synchronization problems I do not want to rely on it too much. So I decided to come up with a fast and easy to make solution. Here it is!
It consists of 24 paper cards attached to each other at the short edges. Every second connection has a tag for the month and each month has two cards to keep all the birthdays!