Sounds petty but it’s literally every time we see each other. DH was due in September but ended up arriving at the end of August. MIL is clearly bothered by this and somehow it comes up in conversation every time we see her. It will be that her great-niece won star of the week and do you know she was born in September, or I ran into your school friend Will who was born in September and that’s a year older than you when you started school, or most recently now our godson who has just turned four is starting school and how young he’ll be in the year just like DH, or any number of other ways of shoehorning in DH’s birthday. He’s now almost 40 years old. He did well at school, enjoyed it, played on the first teams for cricket and rugby and is doing well as an adult. He has a great group of school friends. I get that at the time it must have been disappointing to go from a child who would be Autumn born to a child who is late Summer born, but not to the point where almost forty years on.