“their birthday is standardised for comparison due to a historical lack of records of the actual birth date”
but it’s very stupid cause then you’re like “they’re a young 5” (???)
Oh okay this is only for fast horses. If your horse is lazy it can have a real birthday. This is just physics. As a horse approaches the speed of light its birthday becomes Jan 1 because it's not experiencing time
Horse people like traditions. Also the horse’s age is a factor in which races they are allowed to run.
For example the Kentucky Derby is only run by 3 year old horses.
(I am surrounded by horse farms here…)