Variety of coincidence

My wife and I grew up in the same area but went to different schools. We met by being introduced by friends when we were aged 23. The first coincidence is that we were both randomly selected by our schools to sing in the school choir and then ended up singing at the royal festival hall in London on the same night. We know this because both of our mothers still have the program's with our names on it. Secondly, When I was about 8 years my mother took my sister and I shopping. While my mum was browsing at some dresses just inside the shop door I put my arm through the hinged side of the door, my sister pushed the door shut causing my arm to get trapped. My terrified mother tried to open the door but could not. Suddenly a man comes running to help me, 25 years later I was telling this story to my wife's grandfather, turns out he was the man that come to help me and called the ambulance. Finally ( and this is the mad one ), my wife and I now have two children they are born one day apart with a four year gap. The last six digits of our home phone number are 712829 my birthday is on the 1st my wife's on 7th our son on the 28th and our daughter on the 29th. We are meant to be together and share our two beautiful children.