I previously read that Locke was born in 1956. Then a few days ago I read that the Buddy Holly song that his mother was playing was released in 1957. I did not think that significant - I do not recall the evidence pointing to 1956, or how specific it is.

So is there solid evidence for 1956 as the year Locke was born? If so, could it be that Locke's mother got the 1957 record from a time traveller - maybe Locke's father?