Thread:Shabook/@comment-2106279-20170522153923/@comment-26838855-20170522161054

Yeah that's the "best estimate" thing. He says he was 10, so 10½ is the midpoint of him being age 10, and the day which is that midpoint (aged 10 and 183 days) is April 28th, working from the best estimate at Peter's birthday. It's all the best possible estimate.