Simply copy and type in your Birthday either above or below the posted date, till all members are posted and, hopefully, every day of the year is filled in with someone's Birthday. By the time it's filled it should start with January 1 and end with December 31. I'll start:
August 29, 1958 - Ccoccocats (Cheryl)
August 29, 1958 - Ccoccocats (Cheryl)