I don't know anyone whose birthdays fall on the 29th, but my father asked my mother to marry him on the 29th. He wanted an unusual date for their engagement, and he got it! Tells you what kind of sense of humour he has.
I do remember one year they put in the church bulletin "The Volks celebrate the 5th anniversary of their engagement this week." My older sister turned 15 just the week before which was in the bulletin, and everyone knew it couldn't be 25 years... They laughed so hard at the looks of confusion as people tried to figure out if it was a misprint, and finally one brave soul came up and asked about it!