Seems like someone needs to do a "Falsehoods programmers believe about birthday" ;) It's not suprising really. Many people don't track this when they don't nee

Seems like someone needs to do a "Falsehoods programmers believe about birthday" ;) It's not suprising really. Many people don't track this when they don't need to. Many people used to not track how old they were (i.e. what year they were born in), because it didn't matter. The UK brought in an old aged pension for everyone about 100 years ago. But you had to be over a certain age. So people suddenly found reason for figuring out how old they were. There had been censuses in the UK for ~50 years before that, but the age didn't matter. You could find people who only "aged" 5 years between 1901 and 1911 ;). It's messy stuff like that that can make genology difficult.