Simply provide your birthday (or, well, any day, but we'll assume it's your birthday) and we'll figure out how many days old you are and let you know what famous people did or what happened to them when they were the same number of days old.
You can optionally add the birthdays of family and friends and see what *they* have in common with famous people, too!
Get notifications on days when there is a match for you, if you're into that sort of thing.
The dates you store in-app only exist on your device. We don't do anything with the m other than comparing them to events in a remote database.