His answer was:
"Well, she is now 182. Yesterday she was 181, but she has now turned 182 because his birthday is on February 22. Well, not her birthday anymore, because she is now dead, but his ghost's birthday. So this means that she was born later in the year that my friend T., who was born in January, but at the same time she is older because she was born years earlier".
WOW! Great analysis for a 6-year-old. Lots of compare/contrast, and meaningful connection to his observations about his friend's age and birth date placement in the year.
It may possible, going forward, to leverage his natural inclination to compare/contrast and apply that skill to reading.
He may be more fond of reading for facts (gathering information), and may prefer non-fiction. For example, in reading science and/or history, he may find ample references to numbers, dates, measurements, etc to analyze, compare/contrast, and make connections to his own observations and experiences. Continuing to engage him in conversation about his thoughts may be key. In this way, his interest/affinity for numbers may overlap into reading and ease a transition to becoming an avid reader.
